I didn't see a problem with the voice acting, personally. Not every game is gonna be Red Alert 2 with a full cast of professional actors and actresses doing the voices, nor would I expect it to be. Larian is not a huge company and wouldn't have that kind of budget. Please remember that they are also releasing a number of different language versions, which is going to increase the cost even more, as I doubt the same voice actors are used in every case.
I certainly didn't feel any of it was bad enough to be off-putting.
