2 reasons I wouldn't want to go union free: 1) employment insurance, i.e. if stuff hits the fan and I get in trouble there's someone that will potentially help 2) if JO didn't have to worry about a union the company would steamroll us. They do what they can get away with. A union minimizes that.
As gravy as SkyBest says things are, internally they speak of the company overworking them, rescheduling them too much, and other seemingly small "contract" violations that their student council can't really do much for. That company keeps them just happy enough and pays them well enough to keep a union off property. But there are some bad stories out there where union representation could have made things a lot better.
I wouldn't be opposed to another union though. It looks like we are getting almost entirely new union leadership anyway so maybe things will change. Just need AH and our horrible lawyer to leave. But I'm not holding my breath.