There's one small complication that the voice actors would need to deal with: first they need dialog to voice. So far, there isn't much. Adding another 50 lines of dialog would do far more for the game than voice acting.
I'm reminded of the changes between Morrowind and Oblivion in Bethesda's Elder Scrolls series. Morrowind had literally thousands of lines of dialog, and you could often find newly available lines from NPCs you had previously talked to as you unlocked those lines through quests or other dialog. Many of the NPCs had a dozen or more topics (not all active at the start), and most of those led to further dialog. There was a SMALL list of voiced lines, primarily greetings and taunts, which was sufficient to provide a bit of flavor without the monumental overhead which full voice acting would have required.
In contrast, Oblivion went with fully voiced dialog, which restricted the number of lines to about a tenth (or less) of Morrowind's list (and cost a lot more). Most Oblivion NPCs had only 3-4 lines, and were easily "tapped out" after the first meeting. Worse, they used the same handful of voice actors for everything, so one actor would voice ALL of the dialog for that sex of 2 different races. Then there were the odd cases where the game pulled dialog from two different actors for the same NPC, so their voice would switch from one to the other in mid-conversation.
TW, PLEASE don't do this.
