However, whatever the top APS-C will be, I do not expect it to be much inferior (if any) to the 5D3 as far as specs are concerned. So a 19-points AF in the lower segment would sound possible.
This would mean that Canon would plan to keep aps-c dlsrs alive along ff for those people who like the built-in teleconverter of crop sensors or have ef-s lenses. If this market segment is big enough, Canon might do just that. But my bet is still that they dump the 7d2, raise the 650d a bit above the mirrorless market, position the 70d with a better where the 50d used to be and then make everything like the 5d2 successor (6d?) above that full frame.
This would be a sound strategy because ff sensors have a lot of potential in the future, while aps-c is close to being maxed out and in addition to that, good ef L lenses generate more revenue for Canon.