I unfortunately also agree with this, I'd love to do some of the incarnate things on my Brute or Controller. But even joining taskforces and giving them a heads up of -I've never done this even on live- has gotten me kicked from 2 of them when I didn't know where to go or i didn't have a flight power for zone that has all the floating rocks. So trying to do even harder content where people would be more demanding? Nah I'm good thanks. I'll play at my pace and have fun rather than being called an idiot for not knowing something that was never explained ahead of time.
