I'd love to see an optional grid system that's only get highlighted when used, and which can be dragged tile by tile. Here's a sweet example from Wasteland 2 gameplay footage, but they of course use hexes instead:
http://www.youtube.com/watch?v=R9hQWqtxXPU#t=05m30s

I have to commend InXile for having made it so nice and thin that it barely breaks immersion when it's used.

I got Comment 33,333 at the legendary Larian KS for D:OS