@ashardalon Thanks for all the information! I do think that calling these "every 200 health lost" events "minor crits" is a bit deceptive, because they have almost nothing to do with crit chance or crit resistance. They might only do so as you said when there is nothing else left to crit.
@Fosil I think there is essentially no chance that the fire/turret lost/crew lost events can be caused on every crit role. They were hyper infrequent (saw ~3 in 2 two hours) and only against ships with almost 0 health remaining.
I totally forgot to test braced. When my friend gets back online we'll figure it out.
Good point on the low health fires.
Impossible, I was testing by using Space Marine Bombardment Cannons, keeping all of my units on hold fire and only firing one at a time. You can see an example of my tests in the thread I posted about Debris earlier today.
Yes - my analysis of this would be that each weapon on each ship has arcs defined where it can be destroyed from - because Eldar and Imperial didn't seem to work the same. So basically you'd have to test every single ship and every single system in the game to know for sure.