I don't think killing off Wuk Lamat will solve any issue, it might give people that hate Wuk some momentary relief, but in hindsight it will make the atleast 3/4s of Dawntrail pointless since it is about Wuk's journey and character growth, and her dying means it was all a build up for nothing.

Best thing SE can do if they want to follow with that feedback is to retire Wuk Lamat to just a distant leader (like Lyse) with the occasional cameo, and steer the story into a different direction for our WoL.