Hi 4 fun!btw: "no upgrade path" In form of "buying and using FF lenses on crop sensor cameras" is not important any longer in reality.
My question from above still stays unanswered yet. Although you've found the time to post here.
So I would still be interested why you think that an upgrade path is "not important any longer". Why?
And the same for this question:
What do you think will be Canons future product for birders, wildlifers and sports prosumers and all others that do not have the money to go fully FF with big whites but also want the speed and reach you can get today with a 7D2 and EF 100-400II or EF400/5.6?