It's not that rotor material quality has greatly diminished, but that pad friction material has become more abrasive in the absence of asbestos.
Your claim that your delivery driving abuses your rotors more than a HPDE/open track sessions might says much for your driving style. You're over-driving the car, and abusing it in the process. Calm down, brake a little earlier and smooth your inputs; your brakes will last quite a bit longer. I also drive for a living (heavy trucks), so any excuses you might want to make won't fly here.
As for EBC rotors, those are generally held to be an excellent aftermarket rotor for the Focus. Their Greenstuff pads, not so much.
No need, really, to machine the rotors. If they are worn less than the minimum thickness (but no more than 75%), just swap new pads into the calipers and bleed the entire system of old fluid with new.