if nothing is fouling, it ain't essential.
but in theory an offset caliper carrier could cause few issues:
- caliper carrier or edge of pad slides could scrape along the disc face when hot or disc is warped,
- excessive gap on one side of the disc from the brake pad sliders could lead to unsupported/jammed brake pad when the pads are getting very low,
- when new thick pads are installed and the slider pins bottom out or can't slide any further in to let the caliper move outwards cos the caliper carrier is too far inwards, it could cause the outer pad to bind & wear unevenly
