Vehicle Spawns
I'm just kind of spit-balling here but I think the call-in system should be limited to the LATV, Quads, trucks (and motorcycles, remember those?) and Rangers.
I think that armor and aircraft should have static spawns at the main base and around objective flags the same as previous BF titles. This would incentivize the capture and control of certain objectives more than just the ticket bleed.
Say for example objective "A" spawns an extra Wildcat where-as objective "B" would spawn extra Tank for whomever controls that point etc. etc. And all control points should have some sort of transport that spawns in our near them. And some static assets like TOW missiles, Machine-gun emplacements and AA would be nice too.
The map "Rogue Transmission" from BF4 (and a couple of others I can't remember off the top of my head right now) even spawned an extra attack chopper, so that flag was a priority to hold on to.
Also, it would be nice if anybody could spawn into a vehicle Irregardless if they are in the same squad or not like the transport helis.
Anyway, feel free to share your thoughts.