Well to start off with Schaller didn't work out but was brought in like Rous to protect the assets we already had, it wasn't bad at all in that respect, for years we had the Sedins who were punching bags a lot of the time HAD to be addressed, especially towards our new Sedins in the form of Petey and Boeser, and that was the reason he did those deals but that's the best that was out there available and willing to come to a younger team.
Stech wasn't all that good sorry, Hughes, Hamonic, Myers, OEL are top 6 and Burr middling D same as Stech. both 3rd pairing D's, Rathbone is "experience" away from passing where is Stech was plus much better at quicker pivots by far.
So back to where we were before TG was fired, we still need a D upgrade which we would have already if not for the flat cap thanks to covid but no one saw that coming. However here we are either way, we need help.
Keeping old players with long history of injuries was not going to help us and cost us wins as they did when they went down on a regular basis, which is hard for any team having it's 2 best D out that much.