yours are not ones where the disc is riveted on closer to its edges..
stainless steel does not dissipate heat any where like aluminum will.
so until you replace the disc, the fins added to the pad backing is all you can do.
hydraulic discs heat the brake fluid, unless the heat can be shed some other way..
..
I just ride around town, disc brakes in winter rainy season ... there, I don't need anything special..
you mostly complaining they used what they had in stock when you came in,
and wished you could have saved a couple bucks on the work done?
....