So, basically I messed around with the Lua functions for setting LOS colors (inspired by Dizekat's LOSColors widget). Regardless of what I tried, having radar and jammer coverage displayed together with LOS made the whole scene irritating because its hard to interpret four different overlayed colors (at least for me).
So I removed radar and jammer colors entirely from LOS view and kept only the LOS. Making all the areas without LOS darker than the actual LOS area. Looks familiar to me, probably because other RTSes do it this way.
That ends up like this:



Hm, looks ok so far. But radar and jammer range display is missing from the game now. To have an replacement for it I played around with User's sphere drawing function to have a widget to display radar and jammer coverage. While holding META key, the sensor ranges are displayed like this:




(Blue is sonar range, green and red are obvious)
Sure, its not as accurate as the LOS map itself but I personally still like it more because its very easy to interpret and you can get a fast overview about sensor ranges.
Well, what do I want to say... Basically this (free to discuss): I think it would be great if the LOS view would be improved to have it as the default view. Having this would have some benefits. One is that players usually expect a display of LOS range in an RTS game. I can tell from my own experience that I was quite irritated that I have to press L to see the LOS range (drawn in odd colors).
Here are some points I think would be great to have in L-View:
-working shadows
-higher refresh rate of LOS range
-better resolution of LOS map
Another thing I noticed is that the ground texture is slightly blurred in L-View. Looks like this to me:

(Normal View)

(LOS View)