New weather effects. Sea states. Landing ships that auto-spawn as vehicle hangars when beached. PT boats with a 10 mile ship radar...
Air turbulence that could be set by arena admins.
Hmmm.
And player controllable Destroyers... 
And newly updated planes(i.e. Tempest, 110C-G, A-20G, etc., etc.).
With slideable canopies and beautiful contrails at high alts.
