I have played for about 120 hours.

Still no campaign completed - I started campaigns with Iceni and Sparta but with several patches those just didn't work out. I built a far stretching Empire as Bactria and then got CiG in a Steam Sale. So right now I'm commanding the Nervii und aim for finishing that one before returning to the GC.

Coming back to Rome 2 after Attila - well, first I would have to start Attila, but i'm afraid my machine will not be able to run Attila. Sadly a new one isn't going to happen soon, so I'll stick with Rome 2 for now. Still a lot to try out, e.g. Wrath of Sparta.
Anyway, I would probably go back to Rome 2 sometimes, since I also play the old TW titles from time to time. Not a whole campaign though, just playing around a bit.