For the 5DV, fix this battery drain issue when camera is turned off, and give me 10-12 fps. That may be enough for me to get the 5DV. Give me better spread on my AF points, all the better. I'll happily accept any improvements to the sensor, but they really are not necessary. I would also like >1,000 shots per battery charge on a consistent basis. Right now, I am all over the place. It has never been an issue, as I've never gone through my backup battery as well, but it would be nice.
As for the EOS R system, it is a bit tough to know what straw they have to add to make me start buying into the R system. I've been telling myself if they create a highish (82 MP seems too high) MP EOS R with M/SRAW that keeps file sizes down to ~30 MB when I do not need full IQ that can do at least 7 fps, that I may finally jump. I am hearing great things about the AF after the recent update, so it is becoming tempting. I've yet to try the EVF, but have disliked all those that I have tried (M, Fuji, and Sony). So, that is more about the rumored "High MP" EOS-R.
For me to buy an RII? 30-36 MP, 10-12 fps, battery life over 1,000 shots, whatever IQ advances they have, AF as fast as a DSLR (may be there) and me confirming I can live with the EVF.
But, I am as likely to buy an amazing 5DV as I am an R system camera. Maybe more so.