I think you mean how bouncy wow characters seem to be while moving. I think you just got used to that. Because wow characters are catoony, they exagerate the proportions and movements. But, they are not realistic movements. People don't bounce like that walking/running. SWTOR is more accurate in that sense. If you notice the knees of your character, theres weight when they walk.
Honestly, i played both games for a very long time and that has never bothered me. If anything i laughed at how exagerated the wow animations are.
But, maybe there is a case to be made about how they could have had unique walk/run animations based on class where wow does it based on race for that extra flavor. Oh well..