Simple enough idea: Commander can input the primary team objective and it will show up in one corner of the screen for everyone else.
When your commander is trying to direct you. When you play an RTS game you don't just yell WIIIINNNN at the screen do you? The ability to set long term general markers to direct people would be nice, like pings in RTS games, less hassle than ordering everyone around individually.
Go back and read the OP. To me it seemed the OP wanted there to be a commander-settable MOTD that everyone on the team has on their screen. No individuality and no location information (like pings). If the suggestion were to include these things, my response would of been substantially more positive.
"Hey Guise, this is your Com speaking, North West looks kind of flimsy. I don't think it'll be very fun if those light tanks come there. Can a few of your please spawn there to defend? kaythxbai ;D"
Because not all of us have a mic. And it would be cool to give a main goal while giving squads separate ones under their main goal
Having standing orders which can be set by the comm to update players on the general state of things is a clunky but possible way of issuing general orders.
This would be a nice addition, especially if it could be separated by squads. The current move orders are just really difficult to use over long distances (i.e. select guys, click on minimap, exit/reenter comm, click again, have to scroll a little bit because it didn't go to the right location, set move order, go back to select the troops that got killed, repeat)
I agree with SIP, that's probably the best way to do it. I have to keep typing in order for my message to be visible. "comm ref, comm ref, comm ref, comm ref".
This is a common suggestion, but I think what we really need is some form of beacon instead -- a "some people, get over here!" beacon comms can drop, visible to everyone on the map and HUD, which stays there until moved or the comm removes it. They could be set to appear only for certain squads, or only for certain classes, or only for infantry / tanks. That would be easier for your team to digest, I think, and would serve the same purpose... although we could always have both.
I like the beacon idea. Sip's idea should really be in at some point. And the OP's suggestion was already covered probably 8 months or so ago when someone was designing a new ui...if it happens, it would probably coincide with that.