Hm, honestly, I think my general consensus on Fates's voice acting is "It's hit-or-miss." Oh, but before we get into it, here's the list of confirmed voice actors so far: http://www.behindthevoiceactors.com/video-games/Fire-Emblem-Fates/ and here's a playlist of all the voices for reference if anyone needs a reminder: https://www.youtube.com/playlist?list=PLQmLro5ntw0iqBOeMPiHShXzVfStY_ltD I'll also be putting my thoughts in a spoiler box for length!
Phew, that ended up a lot longer than I initially thought. I also think Awakening, overall, had better voices, since there wasn't a voice I remember distinctly disliking. Still, I can say that Fates did nail some voices and kind of butchered others. A valiant attempt, I guess?