Lol, the debacle with Versus didn't have to do with Nomura as a director.
Yes it did, maybe you should do some actual research. It wasn't just Crystal Tools/FF13/ FF14 woes that resulted in Versus turning out the way it did, a large proponent of it was Nomura and his constant changing scope of the project, even after FF13 was done and out Nomura had a team making the game and he still had the game on the verge of cancellation in 2012, which again is the entire reason why Tabata was brought onto the project to save it by rebooting it as XV to begin with, which is why Tabata headed a new prototype build of the game in 2012 when he joined, while Nomura was still messing around changing a supposed "finished" story constantly, even according to Ferrari there was no set story and it was changing every 3 months under Nomura, this constant handwaiving on Nomura somehow not being the main reason why Versus failed is just a prime example of his fanboys being extreme apologists for him.
Also Tai Yasue is again the co-director actually doing the day to day work on KH3, not Nomura, and Hamaguchi is the Development Lead actually in charge of FF7Rs development, while Nomura's role on both of those is pretty much equivalent to just a creative director rather than someone who actually knows how to manage a project, hell that's why again Tabata was brought onto FFXV.
Versus started development as an actual game sometime in 2010 after FF13 finished, when staff for Versus were being hired and when they had created a modified version of Crystal Tools specifically for Versus called Ebony Engine, and Ferrari stated that he was still doing work on Versus through 2011 too, so to suggest that FF14 tanking massively affected Versus's development is a huge assumption just because those two timelines overlap, the FF14 2.0 team used people who were not working on anything major, Versus and Type-0 were both under going development during 2011 and Type-0 came out in 2011 too, and many people who worked on Versus were also on Type-0 and also stayed on for XV. Versus was a mess because Nomura is a bad director, he's bad at managing a team which even Nomura himself has admitted, which in 2013 when Tabata was co-director of FFXV, Nomura stated in an interview that it is his co-directors that are the most important people on the games because they are the ones actually there with the team working on the day to day workload, which is what Tabata was doing on XV as co-director and what Yasue is doing on KH3 even till this day.
It's also no secret that Nomura's name has star power because of how heavily his name was marketted in the 90s alongside FF7 and following that, and how he is also Kitase's golden child, to the point where pretty much every single game Nomura has been "director" on has had Kitase as Producer on it. Wada was just a business suit that no one wanted to protect, Nomura has protection from Kitase and became "untouchable" within the company ever since FF7s release.
but the KH, KH2, Birth by Sleep, stories are complete on launch regardless the lack of character development or it being a continuation especially if you are comparing it to something like FFXV. In my opinion, I don't think 352/2 days was crucial at all to know about Axel and Roxas. They are established friend in KH2, 352/2 was just extra padding hence why it came out 3 years later after KH2, on a handheld. FFXV purposely left out story information so you had to buy DLC. Totally not the same lol.
They are less complete stories than FFXV is by default of them not even being an actual conclusion to their story because they all lead into a different story, none of those games have character development occur within the game, they introduce plot points and characters crucial to the "main story" in these side games instead of them actually being a part of the main numbered games.
Literally nothing about their "friendship" is established in KH2, what the hell are you even talking about? Axel is suddenly trying to go up against Roxas and you have no idea why and you never find out the reason why in KH2 at all, you are just expected to believe that Axel's reasons are right for no reason and nothing to go off of, and it only answers those crucial elements in a sidegame, alongside introducing an ENTIRELY NEW CHARACTER that also coincides with KH CoM which again, is stuff that directly feeds back into KH2 yet is NEVER ONCE ANSWERED OR BROUGHT UP in KH2, meanwhile the DLC content in XV is literally just expanding on things already mentioned or brought up in the main game. Gladio getting an extra scar after leaving for a few days has literally no impact on the main story of FFXV, him leaving and getting scars or not doesn't impact the main story of Noctis at all, neither does what happened to Ignis or Prompto, meanwhile Sora going into a cocoon for 2 years that he is suddenly waking up from at the start of KH2 despite having no build up or that even being where Sora was left off in KH1 forces you to play KH CoM to even understand what the hell even happened for the main story of the MAIN CHARACTER.
KH is an utter travesty of story and that you are seriously trying to act like XV is in anyway as bad as KH is a joke, seeing as you're another Nomura apologist it's not surprising.
Also you seem to not be aware that Nomura was in charge of all the creative aspects of 3rd Birthday as he is the one who pitched the game in the first place, created the game design and story outline, the story concepts, the game foundation, did the character designs, was CREATIVE PRODUCER that oversaw every creative aspect of the entire game, and he even literally stated that he was the one who assigned Tabata to direct 3rd Birthday to begin with because Tabata understands Nomura's intentions and because they work well toghether, all Tabata did was follow the orders he was given, hell he was literally FORCED to put Type-0 on hold for a whole year because the higher ups threatened they'd cancel Type-0 if he doesn't finish 3rd Birthday. Nomura is not a good director, he's a creative person and a good character designer, he should stick to that.
KH3 started full development in 2013. You might be thinking of some early concept art that was worked on 2006. It will be 5 years when it's released in 2019. FFXV/FFVersusXIII(The Luminous Studio Build) didn't start full production until 2012. So 4 years until it was released.
FFXV didn't start on Luminous Engine until July 2013, in July 2012 it was still using Ebony engine which is what the Citadel Insomnia footage from E3 2013 was running on, while any Altissia stuff from 2013 was just mocked up CG with a HUD overlayed on it by Visual Works and not real gameplay. It was only after E3 2013 that they started migrating to Luminous in July 2013 which both Nomura and Tabata have stated. FFXV was only on Luminous for 3 years and a few months by the time it released, and Luminous was not even a finished engine back in 2013, it didn't become a finished engine until 2016, and that is the main reason why KH3 was moved off of Luminous in 2014 so that Luminous could be finished alongside a single game instead of spread out between multiple games. And when KH3 moved to UE4 in 2014, UE4 was already a finished engine, and KH3 will have been 4+ years on UE4 by the time it releases.