As for full voice acting - there's a really interesting game developer post-mortem with Josh Sawyer where he argues that full voice acting was so so bad for POE2.
He argues pretty much the opposite and his point is only that their pipeline to implement it a the last minute was incredibly stressful.
This seems the opposite of how it should work. I would think that adding voice acting at the last minute - after all dialogue is ~finalized - is much much better than recording voice acting first, then having to re-record lines when dialogue changes..? Can you explain so I don't have to search through that video?
