So you're saying every mapper should make a tight chokepoint close to the bases where you can drop mines?
Except duststorm canyon cyclopean valley isle and possibly slaughtered depending where you set up your base just off the top of my head.
An APC rushing takes far more time,effort,resources and cooperation to start one than to stop one.So If you cant stop an APC rush maybe you deserve to loose.
I agree with Simon's suggestion, and just speed up jeeps. At the moment APCs can out-race jeeps...but thats not because APCs are OP, its because Jeeps are slower than they used to be.