No the issue is not Flashpoints, I am just talking about heroic quests. My server has a good population, you just don't run into that many people leveling at any given time while out questing. I can find group for flashpoints because that is more centralized. The issue arises when you have a heroic quest that is out in the sticks and no one is around. You aren't going to go to the fleet and try asking people there? I know I wouldn't.