It annoys me when people butcher a pronunciation to suit their own tastes. I am Irish and I just see it as wrong and a bit of a slap in the face when people try and change the pronunciation (I have noticed it being done to Aislinn/Aisling a lot...people seem to have decided AYS-lin sounds nicer :/)
Anyway, I think if you change the pronunciation, change the spelling because frankly you would have already lost the legitimacy of the name.