What would they be?
If these ideas would fundementally change the game by affecting things already in place, think like these idea's had been implemented at the start so no one is being nerfed.
After adding races, classes and spells mine would be
1) Structure Greensteel (or similar) at varying levels to introduce crafting earlier in the game.
- Tier 1 available from a level 6 quest.
- Tier 2 available from a level 12 quest/raid
- Tier 3 available from a level 18 raid.
2) Opposable favour.
For example, the Swiped Signet should gain you Coin Lord favour but lose Quickfoot favour (if it was in game).
Purge the heretics should gain you Silver Flame favour but lose Soverign Host favour (if it was in game)
Have the favour rewards different but close in usefullness.
3) PvP
No, not Player vs Player, Party vs Party.
Quests where you are pitted against a team of other players.
Picture a storm the keep type quest with one group playing the part of the attackers (wtih mobs to help) and the other group playing the part of the defenders (with mobs to help).
Or a Stormcleave type map with parties starting at either end of the map and competing for completion to claim the rewards.
What would you like to see?