Yes Please! Freetime was one of my favorite Sims 2 EPs (though the NPCs did get annoying).
I would love to have sewing back. Maybe patterned after the wood working table only based on your creativity skill where you can craft various objects and having a high level or perhaps max creativity skill opens up the option to craft clothing items that would then be unlocked in CAS. (I believe the sewing in Sims 2 does this I haven't had a sim fully explore the hobby yet)
I would prefer to have ballet/dance be a career option though not just a hobby.