For the short future I don't understand why it should be to difficult to make weekend some small events with maybe 50% exp bonus or somethimg like that to attract at least some players and to make clear when to meet in the game.
For the long time success of the game I've never understood why sde didn't took all the money they've earned to invent a real Navyfield 2 thats just a renewed, bugfree, graficaly attracting and feature rich (better chat or even TS integration for battles etc.)
They would have a money maschine, if they would have done it. I think it would be still possible because of the huge Fanbase.