Maybe they are waiting to see how well tge Royal and Windows Edition sell first before locking anything in permanently.
Those numbers are just the Phsycial Royal Edition right? That doesn't include the Window's edition (any of it) and the Royal pack (most fans probably bought this if they already have the game). So this isn't bad.
Also, I'm pretty sure the plan for the 4 DLC's has already been finalized since January 31st (refer to the Dangeki interview). Now, the quality of each could be based on the sales. Since Ardyn is happening first, I expect that to be at least full budget and of the highest quality since it is being made as we speak. As for DLC 2/3/4, the quality could be affected based on these projected sales.
I think overall its doing really well though. I've seen a TON of new people get into the Window's edition, and its been nothing but positive word of mouth.
With the royal edition in early March and Noctis in Tekken7 for late March - I guess we can assume that no XV news will drop for at least a month or two
I think once Ardyn news drops, the rest will drop too. They said that everything will be revealed at once (the last interview stated this) so I'm expecting something in the next month or 2 as well. Does suck waiting though lol