All in all, I think Canon have produced an excellent camera with the EOS R as their debut full-frame mirrorless. What it lacks for in frames per second compared to the competition, it more than makes up for in autofocus points and AF performance. The fully articulating screen is a huge improvement over the rivals. And Canon has by far surpassed Sony and Nikon in terms of desirable launch glass. The wildcard here is the price - hopefully it's very competitive.
I'm not surprised that it doesn't have blockbuster features right out of the gate. With it using a brand new mount, Canon would have to be fifty shades of stupid to build a camera that eclipses the performance of their bread-and-butter DSLRs and the huge library of highly profitable EF glass. The RF lens library needs to grow significantly before we start seeing the EOS 1R models (1D X equivalents) that have the specs most of us are hoping for. Although the impressive launch lineup of RF glass makes me optimistic this will happen sooner rather than later.
Now for my musings on what the EOS R could bring to the table.
Does the ultra-fast AF mean this camera will debut the next gen DPAF? Canon have a couple patents for some impressive revisions - this might be a camera that can compete with the A9 in terms of AF acquisition speed if it's packing a new DPAF architecture.
Has Dual Pixel RAW been improved in terms of focus depth? I guess this would go hand-in-hand with a revision to the DPAF architecture if it's true. DP RAW that can move the plane of sharp focus forward or backward up to a distance of 10-15mm would be a massive improvement. A lot of portrait, fashion, and beauty photographers would kill for such a feature.
Does Canon have any intentions of using eye tracking technology to become an optional mode for AF control? NOT Eye AF in the sense of locking focus to the eye of the subject in the scene (although I expect they'll add that via firmware if it's not available at launch), but rather eye tracking technology for the photographer in selecting the AF point. Canon implemented a form of this way back in the day, but it never really caught on. In this day and age with focus points covering the whole sensor area, and a total number of selectable AF points numbering in the thousands, I expect this would be the perfect time to bring it back as an optional feature for AF point selection.
With the new RF lens protocol, is there a chance Canon could introduce a few specialty lenses to the RF lineup, like central shutter lenses? The Leica S for example has the ability to use focal plane shutter, or central (leaf) shutter if the lens supports it. Granted these wouldn't be high volume sellers, but there might be a market sufficiently large enough to pay a little extra for a lens with a 1/2000 second flash sync speed. While I'm doubtful Canon would create such lenses, the throughput of the RF protocol would likely be more than fast enough to support all focus, image stabilization, aperture control, and custom functions on the lens in addition to a central shutter. It could just be another unique feature that makes the EOS R an enticing platform.
I have a few more thoughts on the potential for the EOS R system, but I'll stop myself from spouting exposition.