Yes voice acting costs money. Everything created and produced costs money to make happen in the game. What's your point?
The point is that VAing everything is something that would have put them over budget, therefore they didn't do it.

You saying "well, everything ELSE cost money too!" is irrelevant. Point is, some things had to be sacrificed, and this was one of the things they felt could be sacrificed. Deal.

If you're expecting all of 2.x to get revoiced, you're deluding yourself.

Mine in part was that if I'm going to have to watch this dungeons cut scenes from start to finish Every. Single. Time. The polish needs to be brought up to a higher standards.
Or you can just... not keep doing the dungeons. Like many of us have already decided on.