The one thing the first game has over later games is that you don't need a power point presentation to understand what the fuck's going on.
Well the game started and I was thinking : "Where the fuck are they? Spira? Why is Wakka there? Why is Tidus mentioned? Is KH1 part of FFX?"
It just seemed utterly pointless to include Wakka in the first part of the game.
To be fair, Sora and friends, being primarily a Squeenix characters needed someplace Squeenixy to start out in rather than "Meanwhile; at the Magic Kingdom: King Mickey summons his hereto unknown greatest general and hero, Sora.". Besides this is a crossover game, and FFX was the latest FF to come out. At least it was better than "Here. Have not-Sora and go through this tutorial area, playing minigames and whatnot. Then 40+ hours of playing as Sora, learn that not-Sora is stupidly important to the plot all of a sudden.".