I think that's a bold claim, considering no one other thank the devs have played the game. Sure, it may seem great, but I'd rather play the game with my own hands to say something like that.
It may be a bold statement, but it's not unreasonable to say in the least. I may not have played XV's battle system, but I have played Kingdom Hearts, and it's a very basic button mashing battle system. Birth By Sleep does a great job at making great innovations with the combat system, but overall the traditional Kingdom Hearts battle is very straight forward and not at all customizable.
The fact that you can customize what combo string you'll do based on a variety of factors including positional distance and direction from an enemy, directional input with the attack button, party member proximity, current main hand weapon, and more makes this battle system already far superior. I don't need to play it to know that if this is how it will work, it's basically a better KH battle system.
Parrying and blocking are still in the game, only they work way better than they did in Kingdom Hearts, as you have attached functionality. Delegating special attacks and moves to a single button in Kingdom Hearts makes the combat feel scripted, while the reactionary conditional based system presented in XV will allow for the user to initiate special moves and abilities based on their actions in the battle system, not based on a button prompt. Other special abilities were activated under certain thresholds that could NOT be controlled, like a percentage based execution which made using them very sporadic and not all useful in a strategic sense, as they are never reliable.
Ultimately all of these factors make for a better battle system. We of course don't know exactly what the battle system was going to be like to full detail, but given that Nomura originally mentioned it was going to be very much like Kingdom Hearts, it's safe to say that it wouldn't be that far off from the traditional battle systems we've had in the past.
We already know that the battle system is going to be much like Type-0, essentially a hybrid between it and Kingdom Hearts, which makes it far better than both individually.
