The camber should only need adjusting if you are fitting a different width wheel and may have lowered the suspension. A wider wheel with no adjustment for camber and in some cases tow can cause it to wear on the inside. I took my Father in Laws car to a specialist near Wales to sort his out as he had bought a car that had been fitted with lowered springs and much wider wheels. I cant see any physical reason why the camber would be changed if you just had a different tyre type. As far as having a softer suspension, I cant feel it on the M Sport.