Aric has said the crawling and pregnancy bugs are fixed in the next update! I think the milk problems are being worked on as well as part of the farm overhaul. If needed, someone posted a while back a little bit of code which adds a "leak" spell for slaves which are having problems with excessive milk.
Viewing post in Aric's Expansion Rebred
Yeah I saw he mentioned fixing those like 8 pages or so back while looking for any other issues people have seen and have a fix for. Will be good when the update is finished.
As for the leak spell or numerous other fixes for lactating problems, many of those are treating the symptoms of the milk production being squared, (removing stored milk, reducing the maximum punishment from having too much milk etc.) rather than treating the underlying problem, that being milk production is being squared when they have any of the milk flow traits. It made a huge difference in the stress milk and lust gains for my lactating servants even without the other fixes, and prevents getting thousands of gold from one 'cow' with slightly larger sized udders and a milk flow trait.