Great camera, great specs but I see the buffer as the weak point. IMHO a CFE card would have solved that, at least partly... I hope you can choose the number of fps while using ES...
IMHO EOS R7 should be available in 2 versions with diff. card options, (like Nikon did with D5). One version includes a fast CFE card slot for use where the buffer is important and one version with 2 SD slots as it is available now. With a bigger buffer, I would have bought an R7 next to my R5 for wildlife, how it's now I hesitate and very likely will let it go.
For shots like these, a 30-4O RAW buffer is often NOT enough... viewtopic.php?f=35&t=4537