With the new long-range AA systems with better missiles, radars, and multi-vehicle mechanisms coming with the next update, it would be great if we could spawn them near friendly helicopter airfields at an increased RP cost or something.
Most GRB maps are too small at top tier considering the mobility of top-tier MBTs, and it would be difficult to hide the large radar and launcher vehicles. Unlike the regular airfield in GRB, heli airfields are not protected by any form of AA, making helicopters easy targets for modern jets armed with guided munitions.