NOE by a small force needs the element of surprise to have a chance to take the base. With a limited number of aircraft, it takes a bit of time to get all the town buildings down, during which time even a single or two determined uppers can often thwart the attack. Kill the goon, or take down one attacker each time you up, and a 5 person NOE raid disolves quickly.
Take away the NOE option, there is a group of people whose fun you just negatively impacted. Not good IMO.
But I don't think this is the type of raid the OP is talking about, because the small raid can and often is defended against successfully. The monster, 20 110s and 10 goons escorted by 30 Nikis raids are a horse of a different color . . .
But now ask yourself -- if you take away the option of a 5-6 player / small squad NOE raid, what is the next logical step? It would seem to me the next step would be that several small squads that used to do NOE raids would instead band together and come in as one of those monster raids . . .
So, the net unintended consequence of this idea, IMO, will be more hordes and hording behavior, not less. I personally don't think that would be a good thing.