I do feel rather sorry for Wyll unfortunately he is just as bugged as Minthara though he at least has 3 relationship scenes if you can trigger them or not that is the question.

I had heard hes getting some attention so I hope it will improve with patch 7

one of my games Mizora turned to dust however I still have Wyll in camp
one of my games he cant follow the team in ACT 3 the Minthara/Jaheira problem
My recent Act 1 Tav , Wyll is missing and I'm yet to destroy/save the grove

Definitely needs something at Ansur however even Duke Ravengard (If safe) Councillor Florrick should have something to say about there being no dragon at some point.