So after getting turn/round structure and basic AI working, I added a basic menu and figured 'hey, now is a good time to do a test build' and HOO BOY-
So er. It turns out Unity has some less than well documented differences between release builds and development builds. In adding a main menu, I also added the ability to start/restart the game, aka 'unload/reload the main scene', which caused a whole bunch of other bugs thanks to me forgetting to unhook destroyed objects from static events.
In short I've fixed everything as best as I can find and the game should work, but there may be crash-bugs and if anyone is willing to give the alpha build a test-run I would greatly appreciate it.