One of my favorite things to do during the levelling process was going to highbridge in eastern thanalan and doing the multi-fate event that happens there in which you aid the npcs in protecting the crates and fighting off your attackers back to where they came.
I would love to see more chain fates like that, where multiple fates occur back to back in the same location that tells a story and lasts a decent amount of time so you don't have to keep mounting up and running somewhere else in the zone.
I think more lengthy events like that would help people have more fun in the world gaining levels and hunting for atma and alexandrite. I like the sort of format where you fight smaller minions and end up fighting a big boss, like Svara in Coerthas.