As the owner of a 7DII that uses it for EVERYTHING.. I love it. love the af, love the spread of points, love the DOF when I still need to shoot wide for low light. I do have a ff, 5DII, and I don't open the 5DII files and ooh and ahh at how much better they are than the 7DII.. in fact they are remarkably similar, for cropability, and the color on the 7DII at higher iso trades off the more grain I may get. There are times I need that 10 fps, and need the anti flickr, and maybe if I had a both a 5DIII and 7DII I'd feel different, but I can tell you I'm going to sell the 5DII and pick up either a used 5DIII or get another 7DII.
People say "sports and wildlife" about that camera like it's its only option, and I'm here to say it is also a great all around camera, and other than the 70D having a flip out screen, I can't think of another canon crop that has something I'd want on the camera. I shoot quite a bit in the studio, and like the faster sync for flash vs the 1/125 on the 5DII. Also like the piece of mind that if I want to go shoot out in some weather, I really don't care, and know the camera can take it (within reason). Proper exposure is the key to the sensor, but it is remarkably flexible, and miles above any other crop sensor I've used.