Man, I've been on this site for over a decade. The logins change, but the relentless d*ck measuring sure doesn't.
R5 II has a stacked, BSI sensor. For certain shooters, that alone is going to be massive. If you're still holding on to a 5D body, and move up, that additional lattitude on top of the standard R system stuff is going to be bananas.
A lot of the people 10-20 years younger than us buying their full frames want to do video as much as photo in pretty much every sector. A combination of less money in each niche and a flood of people with great tools. So I don't blame Canon for stacking the video side. I'll still use dedicated video cameras for bigger projects, but that sensor plus 4K oversampled, or even the odd 8K to push into makes it phenomenal.
I don't care about eye AF, but I appreciate others might. Cool that it's in there.
I rarely if ever need 180 mp images. But I appreciate having 45 to crop with, and an option to uprez without Topaz in a way any client won't be able to tell. Not to mention then cropping into that. I'd like to test that. Sure, if you want to go shoot medium format there's cameras for that. But for everyday use cases and the vanishingly rare need to deliver at over 50 MP, there's now an option for it that is practical, and doesn't mean shooting on a tool that destroys your storage.
And the record limit is...whatever. I've never understood people crying about that. If you need to record over half an hour, why are you using a DSLR / mirrorless and not a camcorder or cinema camera? even doc shooters rarely keep rolling without a break for a half hour.
So yeah - plenty to tempt me. I love my R5 already, and while I'm not sure I'd upgrade this cycle, this announcement looks great. I think this site's dripfeeding of hopes, dreams, lies and hearsay builds a picture in people's head that the next camera is going to be their perfect camera. If you're in the Canon ecosystem, there's now two absolutely rock solid flagships for different uses. I think that's cool personally.