Increasing levels gains new abilities
It would be great if as a player increased in levels he opened up new power packs or gained some kind of ability that new users don't have. This is a common thing in most RPGs that I think would be really cool in the game as well.
I think abilities should be more easily accessible - I didn't even notice them initially
Maybe from the menu in the Dashboard?
Have you checked out your "resilience" and "level" boards? You do get new tricks for your arsenal in there that could easily be made into Powerups or Quests.
A cool idea I just had about this is increase the difficulty of power packs as you level up. So when you first join the game you pick a few power packs that are rated as "easy" or beginner. As you increase in level you can unlock more difficult power packs that may require more effort, but that have a great added benefit to your life. This way the game begins with a small curve for those who may be coming from nothing and can only handle that much pressure, but the curve increases for those who have been playing a while and wish to push their abilities to their limits. This would also give a great sense of progression that I think is necessary to keep people engaged as they reach the end game.