Need a winger in the top 9 who is an upgrade over Prust. I like Prust, he is reasonably effective but his offensive instincts just don't match his linemates and he holds them back a bit. If we get another guy, and Prust goes down to 4th line/PKer that is much better. The 4th line is struggling, they need a guy like Prust who is better defensively and can cycle better so MT can play them in tougher situations. MB has gotten enough salary off the books for next year that the acquisition doesn't have to just be a rental trade, he can have a multi-year contract and it's fine.
They should also get another 4th liner, a veteran as a 13th forward. I don't think Bournival is ready yet. A defensive, tough, playoff vet like Moen, but not Moen unfortunately since he has that extra contract year.