I have been waiting for the R7MKii to replace my 90D. I could not see going to the R7 as it was not much of an upgrade for me and I do have a R5 as well as a Nikon Z6. For my wildlife photography (the majority of my photography) I use my R5 with a RF100-500 and RF200-800 along with my 90D with my EF 800 f/5.6. I was hoping for the R7 MKII to upgrade this. Since the delays in the R7 MKII I have been looking at the OM System OM-1 MKII for more range and better performance than my 90D. Looks like I will be adding the OM-1MKII to my camera systems and keeping the 90D for a while. I could even go to the OM-5 MKII and have an upgrade over my 90D and better performance over the R7. Canons marketing strategies has lost them another customer and longtime Canon user. Also, since I use the Nikon for street and travel photography, I can get rid of that and just use the OM System to cover all my photo needs.
I think your situation is similar to the dilemma that many of us are facing.
The R5mkii convinced me that Canon mirror-less was finally ready to replace the DSLR, specifically eliminating rolling shutter with fully electronic shutter to the point that its a none issue. While bringing many great performance and feature updates.
I was really hoping for a return to the 7DmkII approach, essentially an R5mkii with a cropped sensor, as the 7Dmkii was to the 5Dmkiii, which was the perfect pairing. Having shot with the R5mkii the 7Dii now feel rather "agricultural" and dated.
The current R7 is just not there features and performance, wise and especially with the body layout. Otherwise I'd have picked on up as an interim step.
The R6mkIII does not have the reach and also does not resolve the rolling shutter issue.
The ideal solution that would keep me firmly in the Canon ecosystem is an R7mkii with an RF100-500 (assuming of course that it lived up the the rumored specs). While the loan RF100-500 is a fantastic lens on the R5ii it's still not got the reach of a proper crop body. Where as crop mode drops the resolution just a little to far. I wonder if Canon take into consideration that lost lens sales opportunities along side the body decision. In my case the EF-100-400 would have been replaced with an RF100-500 along with the new body.
I guess both the 7Dii and EF100-400 are coming off sale now.
I was disappointed that the R7mkii seemed to be on the cards for late 2025 and then into 2026 - a further delay starts to rule Canon out for my crop needs for Aviation and Wildlife.