5DII's sensor cleaning and dust delete were absolute necessities for me. I have to shoot in dusty situations a lot, so avoided the 5D Classic with it's reputation for being a dust magnet. It was already bad enough, trying to keep my 30D sensors clean. I went to two cameras, then three, so that I could avoid changing lenses as much as possible. 50D was the first real solution for that, with it's self cleaning sensor... which I quickly learned works well. So now it's 5DII and 7D. High ISO performance was another thing that sold me on the 5DII. I think its quite up to 6400, without needing to do major post production work.
Depending upon what I'm shooting, 5DII's AF is somewhere between pokey and adequate. Yes, Canon really should have improved the AF more when they revised the camera.
I have little doubt we'll see something closer to the 7D's AF system in the next 5D model. Hopefully the 7D's metering system, too. They can leave the 21MP sensor and frame rates alone, as far as I'm concerned. It also doesn't need a built in flash, IMO. It would be nice to see it get the electronic level and the active viewfinder of 7D, too. No doubt it will have a locking mode dial, the relocated off/on switch. An articulated LCD would be very cool, too! I'd really like to see bracketing expanded to more frames, say 5 or 7 or even 9... for HDR shooting.
Frankly, if you don't need more than just those items you mentioned, you might stick with the 5DC until the next version comes out.... Best guess is that will happen next Fall.