Voice-acting and Final Fantasy are usually not a good mix.
I just heard Kuja's voice in Dissidia and...oh god.

Exceptions are:
Yuna's voice but only in X-2
Auron's voice
Cecil's voice (Yuri Lowenthal is a legend)
...and that's it.

So if they can't even get English sounding good I'm glad they're avoiding accents.