To be honest, looking at the R3, I can't help but wonder if the R3 was built from the start as an olive branch to the professionals who *need* the 1-series build and responsiveness, but don't need the additional features that are gonna push the R1 to $8,000.
Global shutter and QPAF will be no-doubt incredible, and the hearsay humors of 84/21mp resolution switching are compelling, but the majority of sports/news/professionals who count on the 1-series have never really needed flashy features, they just need a camera that always works.
In all reality, I'm already perfectly happy with what the R5's electronic shutter pulls off when I'm shooting sports, and the R3 is significantly going to improve on that. With that in mind, I'll view getting the R3 as saving the $2000 or more that the R1 will cost over it, and put that money into an RF lens.