Funny you should mention it, I just got my first Cherry profile PBT caps from Massdrop today, and am comparing them to OEM. Even typing on them for less than 10 minutes, I already like the Cherry profile much better. Since they have a shorter profile, they seem to sit more stably on the Cherry switches, and thus are much less wild to type on. I dont find the minimally less travel distance to be a con, but rather something that seems a little more natural to type on since I am inherently heavy handed with the keyboard. The keystrokes come faster, yet still have the same tactile feedback that I enjoy from the mx blue switches. Im not sure if there is a significant height difference between rows with the Cherry profile, but it feels like it is more flat (but not totally flat) and easier to transition between rows. Im actually surprised that a keycap can make such a dramatic difference in feel, and I think so far that this is the best profile I have typed on. Chiclets are definitely the worst, and I find myself making lots of mistakes with them (which is what I imagine you had with your Apple).
As for the o-rings, I tried them at first to try to dampen the noise of the mx blues, but I found that they reduced key travel too much, and they were uncomfortable to type on. Now only the spacebar warrants the o-ring, since I find it overly noisy without it. The shorter key travel with the Cherry profile feels more natural than OEM with o-rings for me.