IMO:
Dach is a pretty decent skater. Good hands. At his best he uses his body to separate opponents from pucks, uses his reach to strip pucks, can skate well enough to cut through the defense on the rush. However, these sightings have been very rare this year...calling them "flashes" would be generous. I won't go into what he doesn't do well.
Yes, I think he can turn it around. He was set back by his injury and this has been a very down year for the team overall.
It's been no secret Kirby has had attitude problems stemming from frustration, but lazy? Not sure.
IIRC, King was quoted saying he assured Kirby will find success if he continues to be a better person and put in the work. Take that as you will. I don't think that's enough to call him lazy, but maybe I missed something.