It is very hard to find a group for a single flashpoint
As i see many people/ppl avoid them cause maybe are too hard or they just not can find ppl to join in.
even in beta was this a problem
My Advice to Bioware is:
Implement Flashpoint Finder System ( A System that automatic finds a group for you)
or people are trying to level and get to 50, or experience the single player aspect of the game...