Lee is not going anywhere - no one is taking that contract and Lou values him more than we do.
Palmieri would have to go the other way or a 3rd team would have to get involved for retention - and a lot of it, because the 3rd team would have to retain for next season as well.
IF by the TDL - Pulock is still out, then Isles could be cheeky and keep Pulock on LTIR until the post season that would free up 6.15 of cap and Lou could add Buch.
In the off-season, Palmieri then can be moved for a pick and Lou can fill that RW3 with a cheaper player