Regarding 10-11
You do not need be able to play the chords solid in order to play them broken. Just pick a pivot note (i.e., Gb in the r.h., Bb in the l.h. for the first measure). It requires, of course, the absence of tension, as well as intelligent use of the rotation and shift movements. As always, I suggest reading Cortot's comments in his edition, published by Salabert and distributed by Hal Leonard.