Has it ever been mentioned at all why the original VA was let go? He really did sound a lot more convincing instead of Greg Ellis-ey, which doesn't really suit Wyll. You can hear the difference listening to his voice barks (which remain from his old VA and EA) and his dialogue.

As far as lacking the edge, most definitely. EA Wyll was pretty much the CG warlock template, who (mostly) willingly accepted dangerous, soul-corrupting powers in the name of doing good and shows obvious signs of unbridled hate and spite towards anything threatening innocents from his standpoint. That contrasted quite well with his facade of a fairytale hero man and his dialogue had wit to it. Full game Wyll makes no sense as a level 1 character even with the tadpole given his track record, and tying him to Ravengard for cheap drama was a rather weak writing move, in my opinion.