In regards to the "recall" on the WJ Brakes.. it wasnt a recall but an extended service allowance in regrads to the WJ rotors warping. Most manufacturers have an initial grace period on the friction material, on the WJ's its was extended and there were "upgraded " parts available for the TSB, however, they warp aswell.
In regrads to the techs knowing if front rotors are Original fitment or not? There is a clip on the rotor installed at the factory. If its gone the recall cannot be performed.
Any good tech that has been servicing JEEPS can spot a OEM rotor. The guys at Big 4 have been pretty good, There are a couple newr techs there but they have a pretty good crew.