Two years ago Mark it was a great camera and I liked shooting it, but its been a battle owning it. I'm just ready for a new challenge I guess.
Yeah I had the same inconsistencies on the 70d, so I figured why get a more expensive version in the 7dII; Ended up buying the 5dIV, which does F8 using the 1.4xIII just fine most of the time, but the editing process is a lot less of an exercise in frustration than the 70d.
If you're a BIF vet and using a 500 FII and still are getting bad results on the 7dII, than it probably goes into the heap of evidence or preponderance of evidence that they simply have issues that even Canon cannot solve. I wonder how many got pissed off and went to a Nikon crop body?
None the less, what keeps me from switching is I'm finally getting the results I want and there's rumor of new DO lenses coming out in 2018: