This game needs some attention. I have played on and off for a few years now, and I still come back for events occasionally, but I can never bear to hang around for long.
Devs have yet to add anything new and engaging since PvP. We got a level cap increase with a couple cool new raids, but the novelty ran out quick. We haven't seen any radically different mechanics at all.
We need more ways to interact directly with other players. Whether this is X vs. X in PvP, or 2 or 3 person teams vs. raid bosses, or something completely different, we need some new ways to play.
We badly need catch-up mechanics. The slow grind to the level cap made since when it was a lower cap. The slow grind from the old cap to the new cap made sense when it was new. Now, there just isn't any reason for it to take so long to level through all of the content. PvP helps, but we either need a flat cut the amount of energy needed to level in the 30s, or a huge bonus to lower tier valor rewards and some way to turn your killing power into better XP (maybe solo onslaught dungeons, or something).
We also want to hear from the devs. We want to know we aren't on permanent maintenance mode. I can't imagine why anyone still thinks you deserve GS purchases or patronage of any kind. If you're doing anything more than flipping the switches on and off for events, and giving an occasional new piece of event equipment with an extra tier, you don't deserve player support.
This game has potential. Invest something in it. Your long-term loyal players deserve2 it. I can't imaging how people can bear the grind to 90k+ might when you give us so little to stay engaged.