First: Perhaps allow soldiers to 'see' 360 degrees around them for 2/3 squares (perhaps in a diamond pattern), so long as they can't 'see' through walls.
I'll explain why: I'm not sure how many people get this problem too, but I occasionally end up with aliens sneaking up behind a soldier of mine and shooting/stabbing them from a position neither that soldier nor any of the others can see. This means the camera doesn't 'jump' to see the alien and I don't know the trooper is dead until my turn comes round and their number is greyed out. That means almost 90% of the time I can't remember where the dead man or woman was or what weapon they were holding, since I don't really remmber them by which number they are associated with.
Not really a bug, but it's incredibly annoying.
Another suggestion might be to offer the humans a few more non-alien weapon options in the late game. As it is tachyon weapons, once researched, beat almost anything previously available. It'd be cool (in my mind at least) to have some kind of differntiation between the weapons commonly used by humans and aliens, partly representing humanity's attempt to find ways to counter the alien strengths.
(I've already added
a new weapon to the suggestions in the wiki that I thought might suit this line of thought.)
Well, that wasn't quite so short...