I’ve noticed a lot of people routing their sensor cables with the phase power wires from the ESC to the motor. I know in industrial general practice you don’t run power and signal cable together (especially unshielded). Curious if this is a potential problem. If it is, what is the best way of routing the wiring from the ESC to the motor. If the wires are run in close proximity is it better for the sensor wire to be run parallel with the power cables or cross at a 90* angle. With my current setup I can run all my sensor and power wires parallel with each other or a different routing but the sensor cable and the power wires would have to cross at some point. What is a good criterion to follow in this respect for routing wires, or is it not of a concern.

No concern, in my opinion. I've had them cable-tied together the whole way from ESC to motor, and I've had them split up. No detriment or benefit either way.

Never seen it be a problem, there are thousands of cars out there with them running together/parallel.

I wrap mine coiled around the 3 phase wires, same sensor cable from my original RS Pro from what 2 years?

Never had a problem.