Putting in a vote for "voiceless protagonist completely takes me out of it". Played through generations of RPGs where every character other than mine was chatty and I'm over it. I can understand that there's arguments against but...both they and the pro arguments always seem to boil down to preference. Hopefully for the Quiet crowd it's an option, but I'm definitely in the Loud crowd.
I REALLY hope that Larian is putting in gameplay options of this level of scope. There's a wide range of opinions on stuff like this, and although I doubt it can go as far as, FI, RTWP, I think it's worth the development time to give people options, even if I have to wait a few more months for game modes I'm never going to use.