Would be good to see increased use of land/water transport too. Constantly see inf bitch and complain about pilots, heli's crashing or a lack of transport while the carpark sits with its full compliment of vehicles.
I understand that the heavy vehicles are slow, and you either need a competent and trustworthy mate, or knowledge of how to control AI, to use the armed vehicles effectively, but by god are they great fun.
Perhaps it could be worth looking into changing a few inf slots over to armour or land vehicle operator slots to encourage their use. If the server wasnt so limiting I'd maybe even suggest a boat team.
A little variation is great, Ive recently taken to ditching my marksmen rifle for a tool kit, 1 or 2 AI and a Slammer