I'm sure public battles will stay populated for a while but clan wars is dead and league is working it's way to that point. Kinda reminds me of CS 1.6 a little over a decade ago.
IMO I think Luna nailed it. To me this game was just always about chasing something. Grinding for a badass tier 10, improving my play/stats, or getting into a good clan. Once you do enough of that all you are left with is the frustration of this game. Pretty much the only thing I miss is bullshitting with the people I used to play with.