Agreed John DiMagio is one of the greats, as is Tara Strong... it's awesome they got them to do voice work for FFX...
the fact it was SEs first real fully voiced game is why it deserves a little slack in that department, they were kinda new at it... it falls as much on the guys in the recording studio as much as those in the booth... the best voice talent can't fix a newbie at the recording console...