- more bank slots
- character redesign (no faction, only optical tweaks, hair ...)
- housing
- access to "real" auction house (yeah, curse me, craft a voodoo doll and torture me. Just give me an proper auction house)
- more inventory slots
- daily quests? per mail?
- gimmick items? Glyph-remover?

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Some thoughts on champion xp:
- small amounts for gathering nodes? 50 cxp or little less seems ok.
- add bonus for completing anchors (maybe double the gained cxp during dolmen?)
- add more repeatable quests (daily?) or events like guild wars 2 that pop up and give a nice cxp / xp boost "on the fly"
- "Pony Express": Deliver item from one point of the map to another without teleporting (the faster you are, more cxp you get)
Just my 3500 crowns.