He seems like an unispiring hire to me. His teams have kind of always been middle of the road, basically either in the playoffs as a lower seed or just missing. Two division titles in 8 seasons with the Flames, 4 playoff appearances and 4 playoff DNQ's. Never advanced past the 2nd round. He's got a reputation as being aggressive and being "in" on everything. He's made some big swings in the past, at least in the trade market. Generally conservative in free agency, though I wonder how much the market plays a role in it.
I think it's interesting Shanny hired Treliving after reports surfaced about Shanny informing the core 4 they are safe. It doesn't necessarily square with Treliving's MO. He's inheriting Matthews and Nylander, both UFA's after next season. It's not all that different from entering last year in Calgary with Gaudreau (UFA) and Tkahcuk (RFA) without contracts. We know how that all played out. Now Toronto is more desireable to live in than Calgary (especially for 2 American's who may have been spooked by the pandemic) so perhaps Matthews and Nylander are more open to staying than Gaudreau and Tkachuk were in Calgary. I also find it interesting that Dubas, in the press conference that essentially got him fired from Toronto, referenced the Tkachuk/Huberdeau deal as an example of teams being able to make a huge hockey trade to improve. Now he is being replaced by 1 of the 2 parties involved in that transaction.