I say that it's bad voice direction because of the behind-the-scenes facts where voice direction was mentioned. Such as having the direction be that they have to match the lip flaps when dubbing or that they feel compelled to sound just like the Japanese seiyuu.

Also, a lot of people I know blame the voice actors, which is very unfair because the ones who decide the quality and the overall sound of the acting is the voice director, and so that's really their responsibility. James Arnold Taylor is a very good voice actor, and it's unfortunate that because of Union rules, I think, that he doesn't voice in anime that often, because in other incarnations of Tidus he's actually very good. Hedy Buress as well, in X-2 and in Dissida and KH where she reprises Yuna. And X-2 actually got the lip flaps to match the English dub, as a well to assist the actors.