Waiting for the 7DII feels like waiting on the 5DIII to come out. Most was disappointed by the little bump in performance and price hike. Comepared to the D800, but now its selling way better than the competition.
I guess I remember it a little differently. Prior to the announcement, there were any number of people on this forum who absolutely knew that the 5DIII would have inferior autofocus (the catchword at the time was "crippled.")
Then, when it came out, most of the wailing was over the price. Those who bought raved about the high ISO performance, autofocus and almost everything else. As the price has dropped, the sales have climbed and you are correct in that it now significantly outsells the D800.
That said, I would agree that waiting for the 7DII does seem a bit like Deja Vu and I certainly hope that we will be equally surprised at how good the camera is.
Personally I'm not so much concerned about how it performs relative to the 5diii. It will be better than the 7d and that's what matters to me. I rarely use the 7d anymore as the 5diii records way better images...even cropped. If the leaked specs to date are any indication the upgrade is a no brainer. Now...let's see how much canon can milk our bank accounts...