Okay, finally time to mention what I didn't like. Some of these I've talked about already:
The shape of the season. See above.
The laziness of some of the storywriting (especially the darn stocks). See above.
Mistress Goody. I guess she's kind of a replacement for Mrs. Grimwold. Although Mrs. G. had got annoying by the end of S3, I much preferred both her and Mildread to Jade's Aunt from S4.
Some of the outdoor scenes. The purpling gets a little annoying in some cases, and some are just a bit bland for my tastes, although the most bland were to come later.
I'm half tempted to include the Weeping Doors, which I just found dull after a while. The idea to require more correct answers for passage in later levels is a good one, though.