Here's my read:
Yzerman knows he has unlimited time. He looks at the fact that he didn't play in a SCF until he was 30 and didn't win a cup until he was 32. He is in no rush.
He is slow playing the shit out of this rebuild. A lot of GMs push hard into rebuilds and rush players because they know they'll be fired if they don't make it in 3 years. That's how Buffalo got stuck in a permanent rebuild. Like, Benson should probably not be in the NHL this year.
Between ASP, Edvinsson, Cossa, Augustine, Danielson, and Kasper, Yzerman probably thinks he has the answers to the deficiencies on the team.
He went out in the off-season and signed flawed players who were jettisoned from their teams, just to fill out the roster.
This team wasn't supposed to make the playoffs. Does it suck for us to think we were in again and get the rug pulled out? It absolutely does. It makes the team look bad. But I think the outcome of this season is more in line with what Yzerman envisioned going into free agency and signing a bunch of B-level players.
It also lets him see what he has in his chosen coach, and IMO Lalonde is extremely lacking. He is a decent technical coach but the guy is a dead fish motivationally and always finds a way to say the worst possible thing. He has to be gone in the off-season.