Amazing game, having fun with it!
Came here from the Square Table Union video.
While the rules and first two add ons are pretty polished, there seems to be a few minor problems with add on 3.
Special Rule: Overheat states that attacking unit "takes 1 damage". There are no damage rules in this game, maybe you meant gets Downed?
AI Behaviours for Solo mentions Combat Ranged and Combat Melee behaviors, while the rules define only a unified Combat behavior.
It also mentions and Aggressive behavior that's not defined in the rules, assuming that Ritual is what's been defined in the parenthesis.