There may be communities, but one is gone. When the game is based around group based combat and you level like that 80% of the time a community builds around the leveling and reputations for players are very important. I have never seen that matter in an auto-match grouping experience game with most of your leveling done solo. You are just not playing with people enough to build any sort of community around that.. Not sure how that can be disputed.
Sure most games you "can" group, but grouping to conquer solo based content is counter productive for the mostpart and just plain boring. What we need is MORE group based content to develop the community we discuss. There are communities sure, but not the one many of us miss.