I'd want more to take on Kassian, also, Price has said he won't be able to play 55-60 games in a season again so I'd keep Allen too. Looks good though

Price going to Robidas Island (LTIRetirement) as soon as next year seems very possible. In that case Allen wouldnt be moved, and MTL could very well look for a 2nd goalie (Monty is a 3rd)

Hoffman-Wennberg swap would be good on paper for MTL. In my mind Hoffman is serious buyout candidate, so getting a bottom 6 for him would be nice.

Monty is a 3rd Goalie in Playoffs, but is solid enough in regular season

on point with who i'd want to take if we get 3OA. Wright goes 1OA, Cooley goes 2OA, Nemec would be great at 3OA. i wouldn't complain if we got savoie either
the SEA trade isn't one i've seen before, but that legitimately might be a great idea. strengthens the middle a little bit while moving out a guy on our annoyingly deep RW (with random players who could play in the NHL)
i see allen's value being around a second (he's been on a horrible team this season, but he performs admirably as a backup. he can't do a starter load), so essentially the cost of taking on kassian is a fifth, which obviously isn't enough
oh and i personally have romanov at 2.75x3 in my ACGMs, but i wouldn't complain on a 3x3 deal

overall, great job