In case devs take an interest in this post. I think I've devised the perfect assassin fix (maybe) that is also quite easy to implement (I think):
1. You only crit targets that haven't took a turn, regardless of the surprised status.
2. You get a free crit
once per combat.
This way you will utilize assassin's passive working in every fight no matter how you engage it, but at the same time, it will require you to invest in initiative and only allow 1 crit per target to balance it out. Also, there will be no need to mess with the surprise attack system
