It's 2025 and the issue is still there. It's a bit sad that this issue was never fixed. Wyll seems to be completely forgotten by the devs, which is sad because he is the only PoC representation among the companions and Theo is an extremly talented voice actor (just look at his D&D live plays - give that man more to do)
For those, who can use mods, a kind modder fixed it, so that Theos lines are heard instead of the old voice actor. Still, it would be nice, if Larian could fix this. Give Wyll at least a little bit of justice, will you?
Here is the mod lin k:
Wyll - voice fix