Quality voice acting greatly improves the product. If the acting is poor, the game become distinctly cheesy. To get it right, Larian need to go about recruiting voice talent in an informed way and source their talent intelligently. The West End in London is a world famous centre for theatre and there are several famous drama schools there and associated agencies which could help. BBC Radio has a ton of talent used to entrance listeners in radio drama, technicians, actors, agents and so on. There is a world of talent there just waiting to be tapped. If that wasn't explored properly, then Larian have failed quite considerably, but there is no time like the present to start making contacts and find out what is possible and even doable:
https://www.backstage.com/magazine/...gencies-every-actor-needs-to-know-69817/https://actinginlondon.co.uk/top-drama-schools-london/https://millennialstudios.co.uk/blog/top-british-film-production-companies/http://www.britmovie.co.uk/studios/Some games are just brilliant for their voices. Two examples should provide an idea of what can be achieved:
Thief II
Thief II was specifically designed to showcase audio and focus on how audio could enhance a game. Many people don't know that the voice acting for both the protagonist, Garret, and the antagonist was provided by the same person.
https://invidious.snopyta.org/watch?v=u5VI1QcOq74Sid Meier's Alpha Centauri Alien Crossfire
The amazing milieu in this game was brought to life by the different characters which came vividly to life in their voices.
https://invidious.snopyta.org/watch?v=ftefXCqil_U