I actually liked her hair during the short years, especially the first year, when she had the pixie cut.
As to the differences in skating content during the 6.0 era, wouldn't these ladies have trained differently if CoP had been in effect? Their coaches would certainly have had a different approach. It may be that other skaters would have overtaken them, but I can't imagine that, for instance, Slutskaya would have been left in the dust by someone else. I'm fairly sure that Michelle and Sasha would have done well, but maybe I'm not the one to ask, because I'm such an ardent fan of theirs. But Michelle especially had beautiful skating skills, and those would still be valued today. Maybe her career wouldn't have been as long as it turned out to be, but I think she would have been an outstanding skater in any era.
As for Oksana, I was never a fan of her technique. I think there were many weaknesses in her jumps, and I wasn't impressed by her posture. I don't know whether those weaknesses were due to ability or to training technique. Certainly Petrenko, who trained with the same coach, had beautiful classical technique.