I think the target market for the R7 and R7 II is bird and wildlife photographers. They do not need any, let alone high end, APS-C lenses. They will be buying and using "Full Frame" lenses.
Bingo, I'm only looking at the R7 MKII for wildlife. I already own a Sony Full Frame camera that I use to take pictures of people and lenses for that need. But for Sony, to get good wildlife photos, you have to spend nearly $7k on an A1 MK II body. I can't justify the cost. Sony's APS-C cameras are great for taking pictures of people, but are a complete joke for sports and wildlife.
Justifying the cost to switch to the R5 MK II would mean switching my whole system over. I don't want to go through that again. Plus, Canon lacks the Tamron 35-150 F2-2.8 which I love. If they opened up the RF mount for full frame so Tamron could make it for RF, I'd probably go through that hassle.
That's where the R7 MK II comes in. I don't need to switch out my full frame system, I'd just buy R7mkii for my wildlife photography. I'd just buy this and the Canon 200-800. I'd probably buy the Sigma 17-40 f1.8 to use as a backup for my full frame system.
The 2 things I need to make it worth my while are higher megapixel, 39mp is fine, for cropping in on very small wildlife and a very good focus system comparable to at least the R5 MK ii.