Or to put it differently, how would the 7D Mark II sell against a full frame camera that was priced sub-$2000?You forget that there are a significant number of people who want the reach of a crop. A ~20MP crop camera with great IQ holds great appeal for people who shoot at a distance.
Riddle me this.
If you could buy a Canon DSLR today that was full frame but cropped was 18-20MP, would you buy it and crop or would you use the pictures as they were? Or if there was a crop mode for use with L lenses, would you use it?
If the 7D2 had 61-pt AF, 8+ fps, top-of-the-line weather sealing, etc., and the entry-level FF just had image quality and ISO going for it. Even if it takes a lot of corner-cutting to offset the extra cost of the FF sensor, there are a lot of corners to cut in such a complicated device.
Just buy yourself a 1D series camera, ok?