Playing CM1, I was thinking that a differant type of LOS tool might be quicker, maybe like this; Select unit and select LOS tool, a 360 degree( For infantry at full alert, less for tanks, even less when buttoned ect...)'circle' would appear blue\dark blue where the unit could see, red or not at all where they cant. This IMHO, would solve a few issues, like the question of unit facing, as well as just being instantanius(yeah,yeah spelling,I know) accurate and a helluva lot faster than tooling around whith a single bar for minutes on end,trying to suss out coverage. Besides, it may be more realistic that a unit could see a broader area the few feet wide.
This is just an idea I came up with when trying to set up defence in a town, I was getting frustrated wiggling around the LOS tool over every little bit of terrain, trying to see where my coverage was.
Im sure this has probably already been posted, and shot down in flames, but i'll just put it out anyways, just in case.
I'm still very green, but this idea makes sense to me.
Keep on Tankin'