There will be consumer grade, and L lenses. L lenses will be physically the same quality, no matter what the focal length. I expect that we may see some DO lenses, with the smaller body, a smaller size would help.
We only have a few lenses out now for the R, and that is not enough to set a pattern.
However, those that have come out seem to be as good as, or superior, to the equivalent L lens, so my bet is that it will be a top quality big white and I really expect to see DO tech in it. Time will tell, and in the meantime the speculation is interesting.....