yes my 80d isn't going anywhere ..
I got it for 2 reasons ,, family affairs where I need quick and reliable af..
and for its easy to use video AF .. plus fully articulating screen .. the gf and I love doing selfy style shot together during vacations as we go to different areas , for sharing with the family and friends on Facebook or whwere ever..
and I already have some efs lenses that cover a decent range plus the EF 50 1.4
so yes I do agree with you different tools for different situations... I couldn't get reliability out of the a7sii or a6500 for family events .. too many OOF shots..never have that issue with canon 80d , 5d3 (when I had it) or even t4i..
But I do LOVE the dynamic range with sony cameras when doing cityscape shots.. no need for bracket shooting!!
I AM very excited about the xt2.. i'm fairly certain it will be a keeper 
I've held it at store and it feels good.. grip could be a bit beefier but .. I got the extended grip with it for that and for added benefits , not really added fps as I rarely shoot at high fps
yes I do like FF look .., but it only matters to me in certain situations..
for the most part I don't often shoot my 80d or a6500 , t4i and think it would have looked better in FF.. only because of ISO do I find myself wishing it were FF.. most of the time when I miss FF