almost 'clicked'

I THINK I almost 'get' the last cadenza and WHY on earth the composer wrote it the way he did.
KINDA.

I see that sneaky way that you wrote A,B,C,D but with two insanely high and seemingly unconnected notes in between the mini-scale.

And I also see the 'return to I' (E) from the ....oh who am I kidding...I know it's approaching I from the V, but on the way goes through a lot of stuff that I definitely learned in my theory classes and also definitely blocked out of my head as soon as I passed the theory class tests.
ha.