My fist step would be to go on asphalt and really heat them, new brakes usually underperform.I’ve had my Giant Reign E+ for a few weeks now, and although I like the XT brakes I feel like they could do with more engagement, I’ve been looking at either Magura MDR-P or Shimano Ice Tech rotors.
Question is will going from 203 to 220 make a difference and also what rotors do you guys & gals run?
Check youtube. If need be Magura is high on my list.