I ran some test (CMBB 1.03) concerning command and control, HQ bonus and spotting ranges. Since the results are quite exact and, at least to me, interesting i thought i should share them.
In the first test i just tried out the effictive range of HQs and the command delay for the subordinatet unit. Regular HQs without a command bonus can influence other units up to 50 meters. For each level of experience of the HQ this is increased or decreased by 5 meters. A +1 bonus adds 50% a +2 100%. Without LOS the range is decreased by 50%. Command delay depends on the bonus of the HQ and the experience level of the commanded untit. Experience level of the HQ is not relevant except to its own delay, but it gets benefit out of its own bonus.
In the second test i let some units march towards other units stationary and unhidden in "Steppe" (high grass?) altering unit types and C&C. For one thing nothing seems to increase the ability to spot enemy units (tried altering experience, C&C and some different unit types) except binos. The stealth ability of a unit is influenced by experience level and C&C. The experience level of the HQ is irrelevant, except for spotting the HQ itself and the stealth bonus is effective even when all units are moving (thought the handbook told otherwise). Numbers are irrelevant as full squads, half squads and tank hunters get spotted at exactly the same distance. Some results: Moving Regular Infantry in the open without C&C gets spotted at 635 m, in C&C with +2 stealth they close to 360 m. Elite infantry without C&C: 365, +2: 230. I didnt try out heavy weapons, only sharpshooters with an impressing result: regular, out of C&C: 85 m. He was even able to spot the stationary infantry in better cover before the saw him.
I for sure did prove to have too much time and hope the results are interesting to at least some of you.