Do you have specific numbers? Have you been using an IR heat gun to get readings? Have you changed brake pads or rotors, or even wheels and tires from stock? Have you compared the heat readings to other vehicles? Is it just one wheel or all four wheels?
I'm not aware of a warpage problems, brake pad failures or brake failures with your model vehicle. Perhaps the design of the brakes are made for additional heat, but sure would like to know the specific temperature for comparison purposes. I know that I would drive a customers vehicles and then walk by the front wheel and comment, wow, those brakes are radiating some heat. But, without a specific temperature, it doesn't mean too much.
The slots in the front lower grill? mine are open already, beside my fog lights. I was thinking it was to blow air onto the brakes or to break up the front end air flow to increase fuel economy. Advanced Model. Just bought it last week.