I think it would be neat to have accents that didn't sound like they came from anywhere familiar. eg, they were completely alien to Earth. That would be more fitting. Of course, I realize how difficult that would be to truly pull off, so it's not something I expect.

 

Whether they're "old" or "newer" Earth accents, they're all still Earth accents, and thus always remind me that the fantasy world is of Earthly creation.

So as I said before, as long as I can understand them and the voices themselves don't annoy me for personal reasons (usually because of  tone/pitch or too much slang), I'm cool.

Just get your voice actors from the North East of England and Scotland. It will be raw and ineligible to most people, heavily accented to the rest and damn right sexy to some.

Ḯ ẗoö lôvè dìf̌férếnt ačc̈ents àñd hồpé ţhey ṹse thěm ĭň thê diầloğuëš.

No accents, ese