I hope the new APS-C sensors are good. Loved everything about the 7D apart form the IQ was very disappointed. Even if you look on DXO compare it to a 40D there is barely any difference.I am personally not even that happy with the 7D's AF (after all the praise it received, I had just expected more precision and better tracking), but I fully agree that the high ISO performance of the sensor was not too hot even 3+ years ago. ISO 1600 is barely acceptable, ISO 3200 for emergencies at best.
With the 5DIII being to expensive for an amateur, the 6D being underwhelming, I was really hoping for the 7DII although I had preferred to go FF, but at the added cost of replacing at least 3 lenses, I guess I can live with APS-C.
So if the 7DII turns out to be about that, I might finally sell my two Canon bodies, 6 Canon lenses, 3 third party lenses, and accessories and get a D600 with 24-70 (the Tamron looks great, BTW), 70-200 2.8, a third party macro and WA lens, and take the rest of the revenue and put it into some other hobby.