It is a difficult piece, more so that it sounds, so you should be congratulated for making it through beginning to end.
The one thing you could work at, and this goes for all sections of the piece, is phrase direction and a singing melody. Practise the melody line in isolation. Work out which notes are more important and which are less important, this will give you a better idea of how to direct the phrase. Think about how a singer would shape phrases. There are many sections in this piece where the pianistic technique is demanding of attention that one tends to forget about the melody, but keep in mind the melody should be the foreground element. One should not sacrifice shaping melodic phrasing because pianistic effects become difficult.
In the A section, try to think of the moving subdivisions between the notes. Direct the phrasing. Try to create movement rather than a statically even 1, 2, 3, 4 on the beats. Not all notes are of equal importance.
For the B section chorale, work on presenting an elegant arpeggiation of the LH chords and voicing for the top note of the RH melody.
For B1 section octaves, try to keep the hand from shifting to the edge of the white keys. If you keep your hand close to the line at which the black keys end, you will be able to play the alternating black and white octaves under the hand, with much less in and out movement.
For doppio movimento, again voice for the top RH notes. Practice RH alone for melodic shaping.
Bar 73, (8:02 in video) why use 5 on B-natural here, then jump of diminished 7th to another 5 on the following A-flat? Can you find a better finger to use on B-natural.
Work on achieving a more flexible palm throughout the piece. There are many times when your hand, especially inactive fingers, appears tense.