Seriously, just use TS or Vent or Mumble with your friends if you need more teamwork, but as it is, if ur highskill and other highskills are near you, you WILL work together to eliminate enemies, so I dont see why a group command is going to work better than each guy playing to his personal best style
Each guy playing to his personal style = everyone runs where he wants to = everyone will be gangraped and taken out one by one by the enemy infantry cluster.
In least cases personal style means you need to seperate from the group, in fact only Ninjas and cavalry should. Everyone else who goes on his own can't be a skilled or experienced player.
Also don't forget: the more you outnumber the enemy at one point of the map, the lower your losses are over there!
And please everyone: stop the shit with "charisma is needed only" blabla, that's bullshit. Often I saw players, who, once accidentally looked in the teamchat and perhaps read their name, suddenly kept on reading it, and followed tactics although they ran around like headless chicken before.
There are many players who simply join the servers, spawn, run to the enemy and try to kill something without dying. But basically they would also follow tactics, it's just they didn't have thought on this yet.
If we had a system which would make the commander contact inevitably every player (e.g. by a screen message) by default (you have to turn it off, not on!), only those players would make their own thing who actively refuse to follow a commander. And I am sure those guys would soon have crappy stats, as they will be the last remaining targets for enemy cavalry to hunt down.
Crowd > skill. It's easy.
Also: Good Player (100% effectivity) + Bad Player (50% effectivity) = Team (250% effectivity)