I started playing my thief again in WvW last night and noticed this exact thing. I don’t think they should change it to be honest, the stealth thing is way too OP as it is. I ran in the middle of a 30+ man zerg for about 5 minutes just hitting someone and then stealthing before finally getting caught and killed. I have lvl 80 warrior, mesmer and guardian also and none of them could do that.