Starting one of the campaigns, the Russians charging in, I positioned a battalion of tanks and infantry in a city to blunt the offensive and delay the enemy advance in that area. They do beautifully, the Abrams score heavy losses as the Soviets advance, and then the infantry tie up the unsupported T80s when they enter the city. Good job guys, but you're starting to take losses, time to get out of there. Disengage and fall back.
Guys? Guys? I said 'disengage and fall back'! Hello?
All of the Abrams, the Bradleys assigned to the infantry, and the infantry sections all fight to the death. Very brave and heroic, but not very smart. I get the infantry command section, a couple Air Defense units, and one platoon of M2 Bradleys out, but that's it.
They had screen orders, but nope, they barely fall back. I gave them orders to deliberate move away. Nope, the stick it out.
I may be missing something, but I would like a Disengage and Fall Back command. Break contact with the enemy, use cover, move as fast as possible away from the enemy. It probably wouldn't help a tank much (for some reason, 60 tons of steel is hard to hide), but at least it should give a slightly improved chance of retreat. And unmounted infantry should be able to gain significant benefit, especially in built up terrain when there is no opposing infantry nearby.
I had assumed that was what the screening order would do, fire on the enemy until they start to get close, then start to fall back, perhaps harassing the enemy as you do so.
That would be a good command too. Harrass. Probably best for infantry and helicopters. Don't get stuck in, just through some lead at the enemy, make them go to cover, then get out of Dodge. Even AFVs can do 'shoot and scoot', take a few shots, then evacuate position and relocate before the world falls on you.
Just my thoughts.