A few things on my list i'd like to see.
1. A gem shop Portal Folder item that we can put all our passes portals and portal books and portal items into. I mean im building up quite a stack of portal books and portal items. they take up my entire maxed out shared inventory at this point.
2. Upgraded skyscale dash. would rly make the final touch for the skyscale to give a mastery that upgrades its dash with a third bar and longer distance dash like the raptor or the jackal mount dashes get.
3. Aesthetic slot separate from helm for tattoo, glasses and glowing eye helm items. would be nice to wear glasses with my favorite helm or have glowing eyes with a crown etc. They separated them in GW1 so it'd be nice to see a repeat of that action in GW2.