Time to go all in

Dont think that comes close for Hart.

Ukko doesn;t have great value at all, nothing similar to Hart, other than age, but after 3 pro seasons in North America Ukko is probably close to leaving than becoming a number one.

But the Crouse and Mayfield additions are solid

CBJ fans would say it's bad deal for them, but they should be reminded their team sucks, and adding scoring is the way to go forward.
I would try to add pick swap 13 OA with 12 OA in Arizona deal. Could be nothing, could be big. Arizona with 2 picks in top 12 could reach, Sabres also would love to reach with their prospect pool.
Flyers will not make that deal. They could take UPL, who still has potential and his value is relatively low. But it wouldn't be trade with Hart going to Sabres.

The reason it's a bad deal for Columbus is not because they need to score more, it's the fact they need to be better on defense and with puck control. Oloffson went -28 on a decent team. If the Jackets actually end up with room on the wings (they still need to move 3 or 4 guys for that to be the case) I think it's more likely they pick off cap casualties that can also play in the middle ie. Ross Colton.

Look, I like olofsson, I'm probably the last one. I don't think Columbus should be in the market for rentals. Playoff teams that don't score enough (and have a good two-way center for him to play with) are his market. No point trying to jam a square peg into a round hole.

I said any team. Just believed that is a fair value.