Have there been any more updates?
Since the MSRP on the 16-35/2.8L III is $2200, and this one is both wider and includes IS, I wouldn't bet south of $2700.
To be honest the wide angle option is the only one that really excites me right now and sadly I agree with your analysis.
Looking at Sony and Nikon it seems clear that, unless Canon has discovered some huge advance, a 24-70 2.8 seems to be about the same size regardless of flange distance. Indeed with it having IS the new 24-70/2.8 L RF is possibly going to be bigger than the EF L II (the Sony 24-70GM is actually quite a bit bigger than the 24-70/2.8 L II). I adapted my 24-70 L II to the R and it works perfectly and whether I update to the upcoming RF will depend on if a future R body gets IBIS - if it does I'll probably just keep my EF for many years.
A similar story plays out with 70-200 except of course if one makes it extending which Canon is going to. Personally I prefer the current style but I can imagine for travel the RF will work well. My II has been banged about quite a bit and has never missed a beat, I am sure in part because of its rigid design.
Again using Sony and Nikon as a guide - Sony's 12-24 and 16-35GM and Nikon's 14-30S it seems that the reduced flange distance offers big advantages at wider angles, in terms of both performance and size. The RF wide angle zoom will I think be outstanding and seems to be the best compromise - going to 15mm but retaining 2.8 and a filter ring - seems to me a better route than the competition. I therefore expect strong demand and if there is Canon will price it high to start with. I am hoping that the likes of Voigtlander, Tokina, Sigma (and the one I really wish would, Zeiss) start bringing out lenses for the R mount as that will likely push Canon to be more competitive on pricing (just look at the 85/1.4 L IS and how Canon clearly realised they had to go up against the Sigma Art).