Yes they could have been better but for the most part they didn't bother me, perfection isn't always the best thing, I didn't like Yuna's voice very much but I still would rather they had voices than not at all.
The games are advancing, graphics made the characters a lot more human and realistic and voices added a lot to that too, even the english ones. Characters like Lulu, Wakka and Auron's personalities were conveyed so much by their voices, I feel.