Flying
LFR/LFD/Scenarios
More Graveyards
More flight paths
Transmog
Class Homogenization
Heirlooms
More than one raid difficulty
"Improved" talent trees
Sharding/Phasing/Layering
Cross-Realm grouping
In game cinematics
In game quest helper
1hr BoP trading
Non group mob tagging
Improved quest item drop rates
-- Updated --
Faster leveling
Class specific bags
Unlimited ammo
Removal of weapon skill training/points
Competition for profession nodes
Fishing can not fail
One hit of a node (mine/herb) gets all resources
Only one spell level
Dual-Spec
Cheap ReSpec
Portals that remove travel time
Cheap skill costs
Normalized Itemization
Obliteration of dodge/parry/block/miss chance (removes variation from melee gameplay)
Summoning stones