I love your post and agree with you 100 percent, but i think you misunderstood my post, I only mentioned how i would memorize a piece, but not how i work on a piece till a satisfying level.
After memorizing a composition, I would re-analyze its structures, work out personal fingerings, my hands are shaped oddly, long thick thumb, super short pinky, haha, then devise my own pedalings to help produce a soundscape as legato as possible, almost like a guzheng (chinese instrument.), etc...
the thing is, i'm a horrible sight reader, i can only practice a piece when i memorized all the notes, so i need to be able to memorize as fast as possible, my fingers separated method works great for me, the skin on my left hand is infected, as soon as the infection is gone, i'll be memorizing, not practicing or interpreting, all the notes in Chopin's Op. 25, no.12 Etude, i think it'll take me around 2 days, but of course, to get to audition level, or performance level, would take me a whole lot longer.
as for finding what i want to express through a piece, at each measure, each phrase? i don't know, i always play a piece differently each time, with a different emotion, always evolving, like impromptu or improvising, I don't know if it's wrong to play like this, haha.
your teacher 's awesome! i love alexandre dossin's recording of rachmaninoff 's preludes, especially op. 32, no. 7 and no. 10!