Team tactics have been on my list forever. Probably not as complex as you describe, but for example assigning roles to members (for example healer, archer – they would try to stay behind), and simple orders like stay, attack, etc.
I’m also probably going to add an optional full control mode, where you get to make moves for all team members.
It’s not that it was deleted by the crash. Save files are deleted after being loaded to prevent you from reloading them, because it’s a perma-death game. The autosaves should be recoverable though in case of a crash.