My problem is not so much the call-up itself, the problem is why he was called up.
I might've been on board with a Z call-up later in the season, when he would've had a bit more AHL games under his belt, assuming that he continued to play as well as he has, of course. That would've been a call-up for developmental reasons, for getting Z adjusted to NHL speed.
This call-up was done purely as a panic move, a continuation to the Rico waiving, likely prompted by the fact that we're dead last in the standings in the West division. The team has been playing garbage hockey, so Bob hopes that Z can step in and be an impact player right away, somehow magically turning a bottom feeder roster into a "competitive" team. That has nothing to do with development, it's a desperate act from a desperate GM, who's trying to save himself by rushing top prospects.
This is a man who's already ruined one top-10 pick. I'd hate to see that happen to another top-10 pick, who is arguably even more talented than the previous one.