Canon EOS 80D vs Canon EOS 70D: a worthwhile improvement?

The Canon EOS 70D was an impressive camera and naturally its updated version, the EOS 80D had a lot to live up to. The EOS 70D capabilities, with its Dual Pixel CMOS AF and touch screen, allows one to simply tap the screen and move focus to a different point in the frame, were not gimmicks but important features.

And now comes the EOS 80D, a camera that looks identical to its predecessor which itself looked similar to the 60D. The 80D has kept all the good features of the 70D and has added a few of its own, but can it stand on its own?