Good post.
Couple of points. Each one of your scenarios has McGroarty slotted in as the RW on the 2nd line. First of all, this is far from a sure bet. His performance last season in the NCAA was solid but 16 goals does not scream triggerman at the NHL level. What's more, I'm not convinced that a 30 year old Matheson is what the Jets would demand in return. He'd help, sure, but with Morrissey firmly established as the team's number one LD, the Jets may want to address other areas of concern.
Also, your Plan C involves replacing Huston with Buium as the team's premier offensive defender. This after Huston has played all of two professional games (but nonetheless managed to pull Habs fans out of their seats in both). Is it so absolutely clear that Buium is an upgrade? What if Huston goes on the be a superstar in Anaheim, and Buium is merely solid with the Habs? Not to mention the risk that surrounds Zegras....