I actually think that no update is perfect. Every update is bound get a particular group (skiller, low level, high level, you name it) upset. I think one of the best updates, however, are treasure trails, cause since they come in three different levels, nearly everyone can participate in them to have a shot at a decent reward. Out of the newer updates though, I appreciate the "Smoking Kills" update. I'm a big fan of quests, and I thought it was a pretty good quest with a nice reward. It also made Slayer a bit more refreshing (I was kind of getting bored of it) and it basically revived the skill for me.