Awesome....

However, one thing that bothered me about Half-Life 2 was that the logical way to take down walkers or any other high HP enemy would be synchronization of attacks (of course that requires communication, but you could use a flare for the signal to fire or something and as a bonus, if someone who was not attacking gave the signal, it would attract attention away from the groups that were attacking) from multiple sources... if you've got ammo to spare, overkill would be the way to go. So 3-4 RPGs to one walker, or flying Pelican or w/e that sucker is called. If possible, a 3-4 man squad, or at least 2, per RPG, that way, if one goes down, the RPG still gets fired at the correct time.
However, I do realize that that would make it a lot easier to play and not so much fun as you wouldn't be taking down the enemy pretty much Rambo-style.
In Freeman's case, he has a suit reminiscent of Halo, so he would be the logical choice if only one had to be chosen. However, in Real Life
TM, I think he would be perhaps better suited to run interference with an RPG to allow others to line up on the target... everyone is trying to shoot him; he keeps under cover but remains visible (intermittently of course) enough to attract attention and fire from his more vulnerable teammates, who then knock out the big target. As a plus, with his RPG, he can probably eliminate most threats to the attack squads if they call for backup.
Anyways, just my two cents.
yes I know it's just a game, hush over there =P