No other game will ever make this fleet go dead. For the simple fact the core members love Star Trek itself.
Besides it being summer, members always explore and play other games. Shack lead a SWTOR group on it's release and the fleet was void of activity besides all 5-6 of us that held down the fort, kept the light on, whatever phrase you want to use.
So as they said, all is normal. 
(Had to threw ya under bus).