How does MSL approach this development year? That's the key to these players having a comeback year.
IMO, the best lineup to maximize these possibilities, although a bit risky for Dach's development, is the following:
You bring stability to the Suzuki-Caufield tandem with Anderson as the skilled beef that also brings breakaway speed to this line and can carry the puck into the O-zone, making it more likely for a trailing Suzuki and Caufield to set up in soft ice areas for scoring opportunities once Anderson misses his shot on goal after cutting to the net.
You need to give Gallagher ice time for a chance to see the RW bounce back and last year, with Dvorak, showed decent chemistry, despite the down year. A player like Drouin would bring speed and playmaking on the left wing for the Dvorak - Gallagher tandem. While this line wouldn't be nearly as effective as a Tatar-Danault-Gallagher line was in the past, it should still get 2nd line minutes, if only on even par with the 3rd line that would play in a more offensive capacity than normally expected from 3rd lines presented as checking lines.
This line wouldn't be served with the greatest defensive awareness on the left wing, but Dvorak and Gallagher are both veterans and would be better equipped to deal with Drouin as a defensive liability. That risk would be worth taking considering the offensive upside that Drouin would bring to the line.
For Dach's development -- and Slafkovsky's development -- I would unite that duo with Dadonov on the right wing. It would provide Dadonov, on his off side, more opportunities to exploit his shot. The perennial 20-goal scorer would give the pass-first pivot a consistent target while bringing a relatively sound defensive awareness to play alongside the young Center. Dach would not need to handle all the defensive assignments/responsibilities alone, even if he can play a 200-foot game and is quick enough to back check effectively.
Slafkovsky, on that line, will bring puck retrieval/puck possession skills into play, bring the puck to the net and help conflate opposing Ds, opening up Dadonov for one-timers. Dach's pass-first approach to pivoting a line will surely benefit from a natural sniper in Dadonov and a power forward in Slafkovsky that can also be creative offensively.
Hoffman could be used in Dadonov's spot, but it would put unnecessary pressure on Dach's game, defensively due to Hoffman's one-dimensional, offensive play. I would give Hoffman some PP time on the 2nd wave with Dach, instead, to compensate for relegating him to the fourth line.
Hoffman - Evans - Armia. 'Nough said. MSL can try to prop up Hoffman's blue some more in two years.
That's how you maximize the chances of seeing most (forget Byron) of the players listed succeed in mounting a comeback season, IMO.
Anderson - Suzuki - Caufield
Drouin - Dvorak - Gallagher
Slafkovsky - Dach - Dadonov
Hoffman - Evans - Armia