Some thoughts, assuming these specs have merit:
- The EOS R used a slightly modified version of the 5D Mk IV sensor. Based on this, I'd strongly suspect a slightly modified version of the 6D Mk II sensor will be used in the RP. I don't think we will see a truly new sensor until the pro-level R is released. The Mark II versions of the R and RP are pretty much guaranteed to get new sensor tech.
- No touch bar or top monitor makes sense. If you're going to drop a few features to distinguish the R from the RP, these are easy choices. Though, many will say the removal of the touch bar is an upgrade...
- Eye AF support in Servo AF and Video AF plus 4K crop at 1.56x both would imply the EOS R will be getting these features as well, through the upcoming firmware update. There's a close-to-0% chance the RP would have a less pronounced crop than the R.
- LP-E17 seems a suspicious choice, but we'll see. If the RP only has an articulating display (no EVF), I don't see the E17 working out very well. Bigger drain on a smaller battery...ouch.
For those hoping for IBIS in this model...look to the pro-level release in the future. There's no way Canon would infuriate all the customers who just purchased an R by throwing IBIS into the RP. Not to mention, it doesn't make sense for the lineup or cost models.
I'm curious to see what Canon does. Exciting times.