I agree what YuengLinger said that the R is a compliment to the DSLR. But Regarding the R if it is pro body or not, it can holds its own for sure. Other than the smaller body and slight change in ergonomics and shits and giggles features, it is EXACTLY like the 5dIV in liveview mode, which is a pro body as well. People are ignoring this and I believe some folks are misunderstanding "PRO" with "feature rich"...
Sure I would welcome a better body with loads of features. But downplaying the R because it does not have some is really childish to me.
So what is the deal exactly? From my personal experience:
IBIS? I don't really need it, my shots are not suffering from it, even down to 1/15 of a second on static objects, so I am not missing out on anything that I am aware of.
Dual card slots? As a photographer and countless gigs and personal use, I have never ever had a card failure and never shot redundant with any camera. Ever.
Build Quality? Mine drowned in pissing champagne and it is still alive and kicking with no issues. It can take some abuse and it is not so fragile as people (non-users) make it out to be.
FPS? More is always welcome, but as a photographer I learned to pick and time my shots early but it is no deal breaker either, other than the shutter lag, which could have been more responsive.
More MP? Absolutely! But since when is 30MP not enough?
AF? this is on point and very very good. It only sucks on back lit low light situations where it cannot lock on or goes rogue.
Better EVF? I would welcome that to behave more like a OVF but again, it is not holding me back, even at fast paced events.
Joystick? I hated this absence but the touch and drag works far better for me, combined with the improved eye AF and resetting the AF point to the center after each shot, I don't even worry about it anymore. In fact I feel slightly hindered and slowed down when I shoot back with my 1DX and 5D bodies with the joystick! Especially while framing. Crazy right?