I felt that way to. I think that the balance is just right. For me KH was first of all Disney and Square cooperation with addition of FF characters, which of course is nice, but more FF? New characters are fine, but whole worlds? That wouldn't be right, those are separate games so why would they present their stories in KH one more time? It wouldn't fit anyway - one day we have Tidus on Destiny Islands, and the other one he is in Spira fighting Sin? Just go play some Final Fantasy. Kingdom Hearts is a separate thing and it should stay that way.Genarally i think that we have Disney, and for more seriousness we have the Kingdom Hearts characters (OrganizationXIII etc.). Final Fantasy should stay only as an adition to the game. Although summons from FF would be awesome.