After completing EF2, for me there wasn't as much fun in online play as it was for EF1. Now and then I'll do EF2 single player again, but I preferred EF1.
Think in the begining EF2 didn't fly while with my fellow EF1 friends due to the system requirements. By the time systems where upgraded most of the EF2 community has faded, making mapping and modding interest drop. Not sure what it would take at this point to get back into playing EF2, I like the graphics and most of the game play, and mapping for it was fun (think real life and other games got my interest or in the way). A good group/clan of players on a good server would maybe get me going again.
Anyway, EF1 has a bigger online and mapping community, one of the major reasons why I dont play Elite Force 2
The Elite Force sereis is by no means deceased. In fact, there is currently a really big mod project taking place for EF2 known as "A Gate, Two Birds, And The Beautiful Sky." It's the sequel to Colony 7. Go and Google it up.