To me, it must be a small minority of GMs who are really so furious. If there really were a huge appetite for a rule limiting lottery wins, they would have made the rule after the Oilers won last time. It's not like it's hard to change things, like with the changes in how they called penalties, and adding 3 on 3 OT, etc..
I'm not against the idea of a rule limiting 1st overall picks though. I'm fine with it as long as the league doesn't step in an block us if we win this time. Maybe GMs don't want the rule to change because they want lots of top picks if they are lucky enough, and they think that we will improve in time not to be affected by the new rules!