the idea of landing to repair and refuel is definately a commendable one, i can remember when i first picked up the demo being a little disapointed that you didnt have to, with the current system a plane is so higly mobile that you can normally tell that it will be back to get you in the next 30 seconds or less, this will make them 1) a sitting target for 10 or so seconds, 2) slow them down, so they cant defend as easily.
Bunny hopping cannot be removed as it is to effective for running away from tanks, if bunny hopping were nerfed i would suggest either making tanks one rocket damage, or increasing the sprint bar but only allowing one jump per 5 secs, thus allowing you to sprint out of sight instead
C4 should have a reload time, ive recently picked up the specopps kit and have found that its ability to slap 5 c4s (300 dmg splash) in under 2 seconds is just silly, they should have to reload it, like put a detonater in like the AT mines or something, giving the tankers more of a chance.
thats it for now, but ill be back!