Yeah that's how I think a trade could get done. Taking my homer glasses off, I'd say Knight for Laine at 50% retained is fair. Both have question marks but big potential. It would also boost our chances for a repeat this coming season, could help CBJ with their goalie situation.
Knight has a significant salary while potentially being a backup and has been inconsistent with questions marks on his development. He doesn't really factor into our chances this coming season, but we'd have to figure out the backup situation, not sure if Judge Dredd is up to that challenge.
Looking into the future technically Knight is a cost controlled RFA but it'll be a big QO so that's not really helpful. He could also turn into a franchise goalie if he puts it together and I personally still believe in him, but I would get why he's trade bait. I'm also torn about the goalie position in general as sometimes I can see the difference an elite goalie can have (i.e. Bob last two playoffs) and the struggles for teams that don't have a reliable starter, but still question paying more than 10% of the cap for the goalie position. If Bob can do well the next two years, it may make sense to trade Knight to free his cap, then solve for the goalie position later. Competitive window is widest these next two years given our contract situations.
Laine has proven he can score at the NHL level and despite his flaws is the more proven NHL player technically moving into his prime. Obviously he's got his own inconsistencies and issues, but if he can put it back together then you have a PPG 40 goal scorer at a reasonable salary with 50% retained. He'll also be in a good situation with Maurice, Barkov, Zito, the other Finns, and playing for his next contract.
If Laine could return to form we'd have an insane top-9 and theoretically Knight doesn't really factor much into next season, assuming we can solve the backup situation. It's risky but I think it would increase our Cup chance for next two years.