There is some merit in this idea but let me take this just a bit further.
First of all, let's allow both friendly and enemy troop carriers to drop troops which will run toward the maproom (which they already do). Expand the distance at which they currently do so and give them some better armament than a .45 cal (like rifles). Each group of 10 troops would include 9 infantymen and 1 medic. All ten would need to get into the maproom to take it.
Now the fun starts.
Troops could be let go so as to intercept enemy troops. As opposing troops came within a predetermined distance of one another they would stop to engage. Firing could be determined by a random "die roll" to determin effects (i.e. 1-2=no effect, 3-4=wounded, 5-6=killed). It would be assumed each opposing troop fires simultaneously with results being determined for both sides. A wounded troop could continue to fire but his die roll would be modified to 1-2=no effect, 3-6=killed. The medic could not engage, but could "help" a set number (3-5) troops to simulate the supplies he could carry into combat. A "helped" troop would again have his die roll modified to 1-3=no effect, 4-6=killed. As a troop was killed, the furthest back enemy troop could advance until he was no longer the furthest back, then he would have to engage and another would advance. In this way the "winning" troop column could advance past the opposition.
Furthermore, friendly troops entering a maproom would be allowed to live for 10-15 minutes occupying the maproom and engaging any opposing troops as they tried to enter as in the above outline.
Vehicles could fire on and kill troops as normal, however, they could equally easily kill friendly troops in friendly fire incidents. Straffing could kill none, some or all of the troops in the maproom.
The person dropping the troops would have to remain alive, and within a specified distance for his troops to stay alive. If he died, ended sortie, etc., his troops would dissapear.
I think this might add some fun and a new dimension to the ground game.
Oh, I forgot to add, in addition to all the normal scoring mechanisms, a player dropping troops could also be scored on how his troops did in battle.