The only trade in here that has any semblance of sense is that Dallas trade. I would still prefer keeping Robertson though.
First 2 trades don't make sense for the teams getting the LTIR guys.
Blues trade makes no sense for the Leafs. Brodie is our best defensive dman. No point trading him, a prospect and a depth dman for a worse player.
Ottawa and Pits trades are just odd. Those are the type of deals that are done on the draft floorusually. Otherwise there is no point, outside of the OCD optics of filling out your draft pick selections for the next 2 years.