Pallas The local community college had this piece as part of a Piano III class. The teacher also taught it in his Piano II class that I took years ago. My guess is that it was either too difficult for some of the Piano II class students or he was teaching it again to add more layers to the onion.
As far as the internet and piece levels go, I recently watched a YouTube video where a concert pianist was recommending pieces for intermediate pianists. They sounded pretty advanced to me and when I looked them up on the Piano Street syllabus they were grade 10!
Baroque music seems to take up a lot more bandwidth for me than other eras. I generally have to learn in much smaller chunks. I've had good luck with just adding a new note each time I repeat a passage. I also discovered a close to painless way of adding "onion layers" of articulation or dynamics. When I do "X times perfect" repetitions I work on adding in whatever I can manage at a time with each repetition.