Without some sort of experienced players in there, what would new guys learn? Who would answer basic questions, like "why is that base flashing" or "why can't I hit anything...convergence? what's that?", etc.
All they'd learn is point the nose at red icon and start spraying ammo at 1.5k until they ram the other guy or run out of ammo. They wouldn't learn basic fighter manuevers, gameplay mechanics like the strat system, what to blow up to cripple an enemy base, or what's needed to capture a base.
Without someone in there that's willing to help new guys, they would never be anything other than cannon fodder for all the amped-up jugheads in the MA.
You could still have volunteers or trainers in there to help or answer questions if asked. If not always certainly initially. After that they could learn from those who have been there a while. Just as it is in the MA's
you would have to set the scoring system so that your couldnt accrue enough points to be forced out of the Newb arena in a single sitting.
also if you break up the points into bomber|fighter|GV you can practice each of those things separate before your entirely booted out.
Examples after accruing X amount of points you are either no longer allowed to take part in that particular activity or may do so but only with blanks as ammo. (these points numbers are for example purposes only)
Gv- 1,000 points or X amount of kills or a combination of the two.
Fighters- 3,000 points or X amount of kills
Bombers 1,500 points in strategic damage caused and 1,500 points in tactical damage caused for a total of 3,000 points
Any event, by the time you reach the number limits. You should have acquired enough of a working knowledge of the game so as you should have a grasp as to how things work.