The names of the guilty will surface sooner or later. Hopefully the gun-buying population will show their vindictive side. Bankruptcy would be a fair outcome, IMHO, for the economic damage they inflicted with their BF move.
I can't get too worked up, though -- sooner or later I will run out of 5.45, and it will not be economical to buy more. At that point, it'll take me less than an hour total to swap in a new 5.56 barrel and bolt, adjust the gas system, and re-zero the scope. The AR is truly the grown-man Lego set. (Or Barbie doll judging by how much fun some folks have dressing theirs up. Anyway.)
You know who's really going to be steamed? All of the AK74-variant owners. I'm reasonably sure there's no practical way to switch those over to 7.62x39, and I'd be surprised if the US market for 5.45x39 is big enough to start sending us new-production copper/lead 5.45 ammo anytime soon.