I play epic games all the time. I used to play the next-war scenario as a mod but it keeps crashing when I build certain next war units. Therefore, I've cleared out the next war stuff and I'm playing the normal epic game.
Need to note though that I always mod every game I play, so I don't know whether next war's crashing is because of my additional modding or not. And of course this means that I never play the standard epic game, but only my own modded version.
I tried the afterworld scenario before, but really... the camera completely freaks me out. I haven't tried the final frontier scenario, so who knows- when I'll try it I might be sold for life.