Spoiler: show
I don't think it is surprising at all that Morgan is a wackjob. He has a really nice set up there in town though. It's amazing that the Governor hasn't raided all of those guns, but then again, maybe he's tried. It looked like there was fresh blood on that axe.

I'm torn with if it is the last we see of Morgan or not. I loved that last shot of them driving by and you see him with a couple of wasted walkers on the stretcher getting ready for the burn pile. As they said on the Talking Dead, he's a busy actor, so it could be the last we see of him. He was only in one episode ever before. As the title of the episode was Clear. That is Morgan's mission. To clear. So I don't think he'd even want to join any group no matter how good they are.

All in all, it was a great episode, one of my favorites. Definitely good to see Michonne opening up a little bit, and her sharing with Rick that it is okay to see people may sober him up somewhat, if seeing Morgan didn't sober him up already.