I have no much critique of the intro, it's creative, and I like the 3/4 writing for harpsichord, humanization is also well done. The only thing I didn't like is how you introduce the pad, as it does not fit all the chords in progression and interrupts the main theme a bit. As for build up, the harpsichord feels too raw and loud, and I don't really like that one-shot chords. You could work on it more, like adding delay or improving the writing.
The compositional aspect of the drop is well done, the lead melodies and chord progressions are varied and interesting to listen. However, the drop itself is rather long. The 8 bar structure is OK, but the new elements are being added rarely and there are no noticeable changes during the single part. What you could have done is merging two 8 bar progressions into one, adding small changes after 4 bars or creating some drum fills or something like that. Also, the second drop would have been a great addition to the song, as you could make the first one shorter without lacking progression (24 bars instead of 32, for example).
As for instrumentation, I like the sound design overall, and how main theme instruments complement with the arrangement, but the harmony sound design feels simple and not diverse enough. Subtle rhythmic pads or arps may help, also the main synth (the one on 1:10) gets boring closer to the end. As I said earlier, the drop is long, so more sound desing or compositional elements are needed. The mix overall is solid, I would only prefer more width, especially during the first 8 bars in the drop, also the hi-hats are quiet.
Overall, you have done a good work with this entry. My main complaint is about structure, as the song needs more variety to keep the listener entertained, still, I liked the composition and the mood of the song, it was one of my personal favorites of the knockouts. Keep up the good work!