"Master Techs" can skip a lot. If he was just doing a quickie he might not have used the rattle pads or even checked the slide pins. Stopping power also has a lot to do with the pads, condition of the flex lines and the rotors. I know one of the first things I always notice when driving a stock New Edge brake setup (or god forbid a 98-down) that the brakes suck *** compared to the Cobra fronts. Or my Brembos...
If you want to stop well, go find a good used set of PBR Mach/Cobra/Bullitt front calipers, brackets and then get Raybestos rotors from Rockauto (just regular vented) and Centric Posi Quiet Ceramic pads. Install stainless flex lines on all 4 corners. Bleed the brakes with a power bleeder (best $60 you'll ever spend as far as brakes go).
But... if you don't want to do all that and just want it to stop better. Yeah pull it apart, grease the slide pins, inspect everything, put it back together and bleed it. Bleed sequence is back passenger, back driver, front passenger, front driver.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.