I agree with several points, but hard disagree on voiced protagonist. As far as I understand, full voice acting is/was planned, but I'd still prefer a silent protagonist due to the restrictions it puts on dialogue and potential addition of more voices (we only have two per gender; we need more).
Geralt is a completely different scenario, as he's a set protagonist with a firmly established personality. It's also different doing one protagonist voiceover and doing at least 12.
Of course, the point is moot if it really is planned.
The dialogues are already restricted, is not like you have thousands of options, only a few each conversation. What we would need is a few extra voices, all differing in "personality" like Kingmaker has. A shy voice, a heroic one, a lunatic one etc.