I haven't experienced any crashes at all, so I'm sorry but I can't offer any help on that score.
I did, at one point in China, experience the dreaded "error 16" on saving, which I thought patch 1.7.9 was supposed to eliminate.
The game didn't crash, though, it just let me continue without saving. My Sim was asleep in her tent at the time. When she woke up, I took her outside and tried saving again, and this time it saved with no problem and I haven't had the "error 16" issue since, knock wood.
In fact, aside from not being able to use AM, I'm not seeing any issues at all with the game still unpatched at the basic WA version 2.0.86 level.