I liked his work in Crisis Core but from what FFv13 was from Nomura to what became of FFXV it seems Tabitha really fumbled with the game. I think Nomura's vision of FFv13/FFXV would've been way better and better executed at launch if Square just kept him on and let him focus on it.
I was really looking forward to other DLC too!! I hope Nomura can just quickly finish them off after he finishes KH3 before going back full force in FF7 Remake.
Nomura eventually wanted to turn Final Fantasy XV into a musical, so I'm sure it would have been interesting.