Dach is what happens when you take a guy 3rd overall, in a draft where there wasn't a strong consensus for the picks after 2nd overall and then shoehorn him into your lineup immediately after his draft. The kid had absolutely no chance to build any confidence. He had a good -- not dominant -- draft year and then went straight to the NHL on a bad team, just to play 11-12 minutes in the bottom-6 every game for the first 30 games of his career. His development was handled so incredibly poorly and this team was so lucky to be in a position to draft that high.
Dach should have been back in Junior the past 2 seasons. This season right now should have been his rookie year. Instead he spent his rookie season mostly not producing and getting dummied around most games. Then suffered a terrible broken wrist before training camp the following year, losing basically an entire year of development. Now you have a player who's 3 years removed from remembering what it's like to be an important, minute-eating, highly productive player. It's a shame.
I don't think he's a bust at all yet. But he should be sent down to the AHL to get some scoring confidence back. And I don't mean for a 5-10 game stint. They honestly should have started him down there this season. Mitchell is a better player for having spent so much time down there this season after being up most of last year and he wasn't 20-years-old to begin this season.
I'm sure Dach will eventually be traded before catching on somewhere and turning into a really solid 2nd line forward for a team by his 23-year-old season.