Resign almost everybody, move Byron to someone to free up some cap space, and sign someone to play 4th line RW, I personally like Ho-Sang, but I could see a number of players filling that slot, I want someone around or under 28 and under 1.2m cap hit essentially. From a cursory search just now (Feb 15, 2021,) guys I would potentially target that are RFA are: Julien Gauthier & Janne Kuokkanen, (and Ho-Sang,) and UFA I would look at are: Josh Leivo & Stefan Noesen.
Re-signing everyone is basically the big priority though. I have some leftover cap space that could be used to beef up any of the deals I made, the UFA center class is a bit thin for what I think the Habs can afford, Adam Lowry is basically the only other centerman I can see them looking at, but I would stick with Danault. Nugent-Hopkins would be cool, but he's way too expensive. The Byron trade could be to anyone basically, just getting his contract off the books is what I want there, I don't dislike him as a player, but I do think he's overpaid for what he provides, and that money could be better spent elsewhere. Poehling as 4th line LW is exciting to me, and while I would be sad to see Lehkonen gone, he's another contract that is a bit too much for the current cap situation. Price's contract is a burden, but I still think he's one of the best in the league, and I don't see that moving anytime soon, lest something very drastic happens.