They warp because of excessive heat, there is nothing you can put on them to stop it from happening. You either need bigger brakes like FROGBOX did or to buy a nicer aftermarket rotor. I'm not sure if this question was directed at me, but I have the 2014 which has the HUGE brakes on it. No warping issues.
As far as aftermarket, you could either get a high end rotor with better materials or you could move to something like a slotted or dimpled rotor that is able to better dissipate the heat that is building up. Your driving habits also contribute to warping, but it sounds like the older brakes are just a bit undersized to me.
Towing over your capacity is illegal. Forget about the capabilities of the car.
Not using brake controller with 2750lbs?? C'mon, at least do it for everyone else on the road.
