Instinctively I want to get a 6D2, an affordable and well rounded Full Frame body, but really if the 80D gets higher resolution with good AF and a nice compact body, that's more up my alley. I want Full Frame, but not with all the extra bulk.
And then we have the High End EOS-M to throw a monkey wrench in things. What kind of features are they actually willing to put on a mirrorless body?