Haven't read the whole thread and I'm sure this has been mentioned already, but I personally don't find anything implausible about the ship's computer creating a simulation from sensor data to aid in gunnery control. We already have stuff like this...hell, there are consumer automobiles that have stuff like this to make it easier to reverse and park.
Biggest problems I've seen with multi-crew so far isn't what's included, but what's missing (everything non-combat except mining turrets), and the only included features I take issue with are telepresence in general (which does have a good gameplay reason behind it, and could be balanced by giving it a range limit), supplemental pips (encourages people to multi-box for benefit to a single player), and bounty/bond multiplication (which is completely asinine, as well as easily abused).