Your master cylinder does not pinpoint pressure to just one wheel on the car. that is not your problem.

When you say dragging? Can you feel it or are you just throwing that term out there because you may hear a little noise from new pads and rotors seating? How do you know it's dragging? All pads stay in constant contact with the rotors at (pretty much) all times (not going to get into pad runoff in racing conditions- does not apply here)

I will say you have an alignment issue and you are wasting money and time on a MC replacement.