1. My tanks have line of sight, see the enemy, but do not fire. I don't quite understand why this is? There are literally tanks/atg/infantry all around them, however the turret is constantly changing targets and not firing. Maybe ill get a burst of MG fire on a infantry unit, but its never consistent. I either have a game where the tanks are blowing everything out of the water, or they are sitting acting very strange.
Can you show the specific situation on the screenshot?
(selecting one unit that does not fire)
Just in case, the game does not have laser weapons, so the presence of LOS does not mean the possibility of shooting, since guns in the game (as in real life) shoot shells that fly along a ballistic trajectory, rather than straight from sight.
2. Communication links - How the hell does it work?
Automatically, the signalmen make a wire connection between their commander and his subordinates.
3. Indirect fire confuses me too even though I've seen the tutorials. I put the commander with line of sight on certain areas and place my guns behind cover or behind something. I set the area for concentrated fire and watch the 1:100% circle icon come up. But nothing fires... Why is that? I have line of sight! Does the gun need LOS too?!?!
Same as #1, you need LOF (not LOS!) direct or indirect, shells, working gun, and the received target designation through a communication line (for indirect guidance). All this should be at the same time together.
4. Artillery Observers: Love them. But how do I move the original presighted firing positions without making the spread SO HIGH and waiting 15 minutes for the artillery to prepare?
What is "original presighted firing positions"?
The game has:
1) Targeted points: used to quickly and accurately point the fire (indicated by orange triangles)
2) The shedulled lines of fire (those places where the guns will shoot at the given time).
For unshedulled fire during combat, you can set (2) in dynamics, the accuracy of the task and the speed of opening the fire will depend on their visibility for the spotter and proximity to the (1).