As the title says, the AI do not keep up with a human squad leader, and do not respond well at all to movement commands or "get in" commands when they are in danger mode. This has been a nagging issue at least since the first ARMA, and we really need it addressed. It makes the AI an annoying hindrance rather than an asset to be used and enjoyed by the player.
The AI need to put staying in formation with the squad leader above whatever their own "normal instructions" are telling them to do. If I, as squad leader, run across a valley and up a hill, and I have not given an order to do otherwise, my AI squadmates had better KEEP UP. They need to RUN. I should not get to my destination and then have to wait a minute or two for my squad to catch up. If I thought it was necessary to move slowly and carefully, I would have. The AI need to "trust the squad leader" and follow his lead.
When in combat or danger mode, the AI is much, much worse. When in this mode, nothing a squad leader does will cause the AI to MOVE. There are many times when you just want the AI to stop all else that they might be doing and MOVE. For example, let's say you want the squad to quickly move over the crest of a hill to put the hill in between themselves and incoming fire. Instead of quickly moving as commanded to do, they slowly bounding-overwatch-move their way, or flounder about, and get killed. All of them.
As squad leader we need some other type of move command. One that says "no AI, I don't want you to take all day to get there as you slowly go through a 'bounding overwatch' movement resulting in you all getting killed, I want you to DROP EVERYTHING AND MOVE!"
I suggest adding another type of move command. The squad leader should have two different "move" commands to choose from: "Move" and "Tactical Move". Tactical Move would function as our current move command does now, and the command would be given in the same way. The standard "Move" command would just be renamed to "Tactical Move". The new "Move" command, on the other hand, would break the AI out of whatever they are doing and cause them to MOVE VERY QUICKLY to the given destination. There would be no bounding overwatch, no hindrance to their movement at all, even if they take fire. They will treat the "Move" command as life or death, GET TO THIS LOCATION! Once they reach the destination, the AI can then resume their normal behavior as the situation or squad leader dictates.
Both move commands should be shown on the same menu, without requiring Left CTRL or Left Alt to be held to show it in the command menu. This makes it not only easier to use, but also easier for everyone to see it as an option. Simply choose either "Tactical Move" (the Move command we have now, just renamed) or "Move" and left click to issue the command. {F25430}