Just a random wish. I hope ARR incorporates features which discourages elitism and promotes casual players participating in more dungeons, other higher end activities.
For Example:
Perhaps a higher drop rate bonus when having a first time dungeon player in your group.
Bonus XP for entire party when grouping with a player with high rested time.
I'm sure theres many other ways, but basically giving incentive to group with casual players.
Thanks for reading :p