It just so happens that Treliving's former team is in town tonight for a rare Friday night Leaf game. During his media availability this morning, Sheldon Keefe admitted he and Treliving had a conversation about his former team and what to expect. Based on Keefe's response when asked about the conversation the two had, it sounds like Keefe was subtly hinting that he wouldn't mind acquiring a few members of Treliving's former team.
The Leafs definitely need to upgrade blueline, particularly the bottom pairing and adding one of the afformentioned UFA defensemen from the Flames roster would certainly do that. Acquiring any of them of course would require some very good cap gymnastics as the Leafs have just $22K in available cap space with the use of LTIR.