it looks like the animations on actors are the only asset that works. if you use effects, powerstyles and talents then the game will crash all the time.
Thats not true, how do you think we got Green Goblin and how we are getting Songbird and Penance. Effects, talents and powerstyle all work. Pretty much anything that doesnt work ends with a .igb, except animations which do work. So skins, textures and most bolton models dont work. I used the effects, skeleton, talents and powerstyle to do the XML2 conversions and to do my own quick MUA1 versions and both worked with some editing and no crashes.
I think that unless you are an experience modder you should probably not mess around with these files, or at least back up your game before you do so.