Tampa declines. The cost to move Callaghan is likely one of: 1st, couple of seconds, or a prospect or two (of which they continue to be loaded with).

Shaw ends up as an overpriced 3rd/4th liner on Tampa (he's good, but there's a number of people ahead of him on the depth chart, and there's a number of much cheaper prospects that could be plugged in there), Kulak as a 6th/7th dman, and Lindgren as the 4th/5th goaltender (he has little to no value). This doesn't really solve their cap problems, and gives away an extremely valuable top 4 D.

Don't think you're getting him back.

See your points and I agree with them in most part, but if there are 5+ teams trying to offload contracts cause of the cap, the market just went up. If moving Callahan means keeping Brayden Point, losing Sergachev might be worth it.
Can you blame me for wanting him back? Every time I see Drouin on the ice I wonder what Sergachev is up to...