Experience with Waters UPLC, PDA, and QDa?

I work for an in house testing lab at an extraction facility in NY. We recently acquired a Waters ULPC e2695, PDA 2998, and QDa detector.

I have been running an Agilent HPLC for potency testing. Besides potency, what exactly can this machine do for us? Potency obviously, but is this achine more accurate? what other tests will this allow us to do, I assume heavy metals? what about terps, heavy metals, pesticides?

I’ve been reading up on mass spectrometry and the PDA but if anybody can point me in the right direction that would be great, thank you