After a lot of consideration I like both these ideas a lot! Farming does still seem easy: Needing more fulltime dwarves might be fun.
Problem, though: Herbs are ALREADY too easy compared to farming. I've never had that big of a fortress, but after a year my one herbalist is up to legendary, and there's HUGE piles of all outdoors plants sitting around. This would just make herbalism easier by comparison, and then why would you bother to farm? I guess farming would be a large-fort thing: For when you have lots of dwarves and can afford to make 1/6 of them fulltime farmers.
Soap and tubs I very much like. Who does the tub-filling and soap-fetching? Seems like commoners would tolerate public baths but be overjoyed by a private bath, and would always fill their own bath. Nobles on the other hand would be very upset by public baths, and would have someone else fill their bath for them. This implies a new task, "servant", which just means they do these noble-placating things. Tubs should perhaps belong in a bedroom, I think--that allows them to go in barracks, too. And of course you can define a bedroom from the tub itself if you want.
