In the Game, The Air RB maps are Very small, this wouldnt be a prob for lower class Jets like the early sabers and migs. But Whne you start climbing in the ranks of Jets you get faster, and more long range wapons.
I suggest, Past a Certain BR All the Air maps become EC maps.
Same with Ground RB We have Tanks that can shoot miles out, but are limited to tiny baby tank maps.
SO TL;DR: Bigger maps for higher Br Jets and Tanks.