Interesting thread as I'm just trying to decide wether to do/don't myself.
Currently own a 5Dii with approx 130k clicks, and I'm really looking to get a more technologically advanced camera. I'm in the exact same boat as OP though, sitting with a bunch of Canon glass and would rather not have to swap it all out. I'm not a pro photographer, but I am running a business and have made a reasonable amount of money this year, and there'll be more next year.
I was pretty much set on getting one, until visiting my local photo shop the other day. He said it was a no-go, hands down. Using Canon glass on a sony body just wouldn't be any good, and he was super confident about it. He advised me to get a 5DSR, which IMO is a completely different camera. After some discussion we landed on the 5Diii, which haven't got what I'm looking for; it's a 4 year old camera, and missing a lot of tech. Going for $3200 where I live, it's a lot for this body when a 7Rii is to be had for $4K. Comparing these two there's no doubt who's on top.
OP, how are you getting along with the 7Rii? Have you got the MB-adapter as well as the DEO? Could you see you self using this camera full time as a main camera, ditching you Canon bodies?
4̶0̶0̶D̶ | 4̶0̶D̶ | 1̶D̶ ̶M̶a̶r̶k̶ ̶I̶I̶I̶ | 5D Mark II | 5D Mark III | A-1 w/ FD 50 1.8 SC
EF17-40 f/4L - EF24-70 2.8LII - EF70-200 f/4L - EF50 f/1.4 - EF40 2.8 - Samyang 14 2.8
2x Elinchrom Ranger Quadra - Manfrotto 055XPROB w/496RC2 - MB PL-3N1-35