I've completed the campaign twice, but never lost. It seems to me that there's a pretty bright line between "I lost the campaign" and "I won but it was really hard," where the former are upset but the latter think it was fun.
So maybe those of us who didn't lose... don't have meaningful opinions. Maybe the only opinions that matter are the people who are upset, because we want to reduce those. If people like us, who think it was fun, think a rebalanced scenario was less fun? That's not really a problem. But people who play the intro and get mad are a lot more likely to dislike the game altogether, which is a problem.