We have a fix for the trade issues in the works. We will also examine health regen, though, this may not be a bug but a matter of balance (a bug was fixed with it that may have shifted things from what people were used to - but i am not sure yet).
Regarding "auto win sieges" is this something you personally experience? Do you have any savegame prior to it happening?
For crashes, as long as people are uploading the dumps we will resolve them from most common to least common.
@Concomitant could you please provide a savegame where you are experiencing the issue?
The auto win sieges were from a prior save on 1.4.2. with 1.4.3 added, I did not keep the save file as I wanted a fresh 1.4.3. The snowballing issues that the AI is doing (winning sieges and taking a lot of territory) in the first 10 minutes of the game is on a fresh 1.4.3. The snowballing is present on 1.4.3 but I am not sure if the auto win siege bug is yet as I have not got that far into the game.