If Slaf was playing 19min a night and was PPG (even if only PP points) I don't think anyone, much less me, would've criticised his handling. What I criticised was the simple fact that he (1) underproduced, (2) underperformed, and (3) couldn't earn much TOI on a terrible team. He only got toward the low teens in TOI when half the roster was injured. He was in over his head and kept there until he was taken out with a big injury.
But that's in the past -- this season he has to show something more than he has in his past two 10pt seasons. He has to show growth.
I don't expect him to keep up and track along with Cooley's production -- and as you say there is no point or way to compare the two -- but I do think it's only right to expect him to show more than last year. So we can evaluate at different checkpoints, 10gp, 20gp, etc. to see if there's a pattern. I expect to see at least a more comfortable player on the ice, which so far in the regular season is a TBD. Earlier I said 30pts was my benchmark, anything more would be a genuine surprise, anything less would be a disappointment and worrying. I think I've seen a few commentators bandy around that 30-35pts expectation, so I think we're not far from the mark.
The only point to bring up Cooley now is to pour cold water on the 2022 Draft minimizers. It might've been a weaker draft but there is no excusing the Habs if they got it wrong.