The only other rule change i can think of that might fit in to this category was the rule change on repetition of triples and double axels in pairs right before the Torino Olympics. In short the rule said that even if you did a triple (or double axel) in combination you could not repeat the same triple (or double axel) again later in the programme. The rule seemed to be extremely biased in favour of Totmianina and Marinin who were doing SBS 3S and 3T in their LPs. I believe that there were a couple of other couples showing two different triples in the LP, but Shen & Zhao were doing two 3Ts. The rule had it's supporters that explanied that the rule was for the benefit of the pairs - pushing the limits of the pairs to include more than one type of triple. Others felt it was unfair politicking by the Russian fed in order to get their pair who at the time had no chance of beating S&Z artistically by changing the rules to favour their team technically. As it happens because of the way the rule was worded S&Z decided to try 3T/3T (as the rule said you could do the same triple twice if it was in combination with itself, hence the 2A/2A sequences you see in pairs now) and that's how he reptured his achilles tendon.
Anyway other than that rule (which in addition to the Russians benefitted a couple of other pairs) I can't think of a single rule change that would benefit just one skater such as changing the SP requirement for women.