For all the crap he gets on our boards, and abroad, we were a much better team with Gudbranson in the line up.
I can't imagine we'd get Kapanen for him, maybe an equivalent prospect from a team starved for leadership and physical right side D, ie optimal circumstances, but Canucks D to Toronto has been beaten to death.
Further more, we aren't in a position of strength there any more. Yes, Tryamkin was that big a blow to our depth. Trading Gudbranson for Leipsic doesn't help us long term, as we have a number of winger prospects that offer what he does. Unless we're hoping for a Alzner type signing in free agency, or maybe a Seabrook cap dump to us (which constantly gets shouted down when I say we should explore that option) we are creating a hole to fill a surplus.
Plus, I mean it's like a 2 year age difference. It's not like we're dropping a 35 year old for a prospect here.