I don't own one but from what I have been reading and observing about the 7DII, I have a feeling the majority of the focus issues are operator error. I know some bodies have had legitimate focusing issues but I think that is a small percentage of the cameras that are in use. The unhappy people seem to make the most noise so it makes a problem seem worse. Look at some of the images posted by the 7DII owners and you will see some really great shots. It seems that once you get the AF dialed in the camera produces outstanding results.
I moved from a 7D to a 5DIII and I really like the 5DIII, however I do miss the reach if the 7D. I am saving to buy a 1.4 TC and then I will be back almost to the same field of view as the 7D when I need it. When you get ready to buy, check out the Canon Loyalty Program if you don't mind a refurbished body. I have purchased both my 7D and 5DIII through this program and couldn't be happier. You can save some money on the 5DIII but it will still be more than the 7DII.
Whichever body you decide on don't second guess yourself. When you get your camera, take lots of pictures, be happy, and try not to develop GAS (Gear Acquisition Syndrome).

