One reason why Divinity Original Sin 2 doesn't have voice overs is: It has over 10 times the amount of dialog that Divinity Original Sin had.
Divinity Original Sin took about 6-9 months of non-stop work to get all the voice acting done. It would simply be unreasonable for them to voice every bit of dialog now. So it is more than just the cost, it is just the sheer amount of time it would take.
They MIGHT end up doing some voice acting (similar to the non-EE version of DOS) but those will just be small blurbs spread out through the game and an opening and/or ending.
Last edited by Neonivek; 24/05/17 01:40 AM.