Very cool. A great story that interplays both character development and the complications of time travel and altered timelines together. Great stuff.
The only caveat I have is about Ellison stealing Cromartie's body. I don't mind that he's just made a royal screw-up, I find that rather interesting, and it's very in-character with his wanting to get to the bottom of everything. It's more along the lines of I want to see different Terminators coming after John Connor now, and I'm too afraid that Redhead-1000 is going to just fix him up.