I wasnt the personality shift Yuna went through from FFX to this game...
It wasn't the annoying banter between Yuna and Rikku...
It wasn't the lack of plot untill yo uget three quarters of the way in...
It wasn't even that you needed 100% to see the real ending.
It was how the Farplane was used. It was horrible, it was turned from the place of the dead to just a storage house for the ultimate weapon... And although I liked Auron, Braska and Jecht encouraging you through the final batles there was SOOO much potential missed here...
I think, if the Farplane had been an explorable area where you could interact with characters (maybe???) that would of been great. And imagine if Yuna met EVERYONE that she'd ever met who had been sent to the farplane EXCEPT Tidus who had mysteriously dissapeared, how heart rendering would that of been.
Just, in general, the way the Farplan was managed, and the new look it had really annoyed me, from start to finish. Some nice ideas but they were woefully underused.
I think that applies to the whole game, really. It's not a bad game but, like FFT:A the enjoyment comes from playing the game rather than the story which was seemingly chucked out the window at an early stage in development.