Umm, that's precisely what happened: they changed every hard stun's range to 10m (those that previously had a 30m range, of course; Dirty Kick is still a melee stun).
Yep. And honestly, it took about 10 mintues to adjust play style to deal with it in PvE, on multiple class types that I play.
People get so rigid in their game play. It's an MMO, class skills change over time in MMOs. There are a number of factors that hav to be balanced all at the same time. There is no optimal solution really.