Further, more and more of this seems to have been "backported" into traditional desktop presentation design.
While I will experiment around until I more or less "get it" (although I may miss finding some useful features for months), it particularly frustrates people like my parents. Mom is somewhat spatially challenged (although plenty bright in other ways), and I've had numerous calls with her where the controls for what she wants to accomplish have changed and simply bewilder her. AND, given her spatial orientation problems, sometimes we will have to have the same conversation several times -- because the rather arbitrary-appearing icons and patterns don't immediately "sink in".
P.S. I mean this as a legitimate question, if it fits the parent's -- or others' -- field of experience. It seems that a lot of this design is expected to simply permeate and be picked up by osmosis. Is that really the case?