In my opinion, this all boils down to HCS decision on PvP. I just don't get why the dev would shy away from PvP (which is voluntary) and focus on more of a dungeon type based games. Hell even in FS, their most successful game, PvP is a joke.
Even the most basic tournament setup(1v1 ELO/weekly) can alleviate the pressure for contents. Releasing 5 new levels of content shouldn't have people complaining a month after it comes out. PvP has the most potential to be a content multiplier out of any other aspects of this game. It is why the wilderness in RS was so popular and, in my opinion, allowed it to grow as a game. Hell release a new cache of equipment every couple weeks or so in different aspects of the games and watch as people line up to do them to try and compete in PvP.
I've written a lot on this subject when I was actively playing and I still see that PvP is still abysmal. I want HCS to succeed, but Ive been pretty sad wit the direction of this game. How the hell did Mount became a priority Ill never know. Anyways here is what I think HCS should focus on in order of importance.
1. Hardware Rendering
2. PvP, at least a basic tournament
3. Guild/AH
4. Skill Balance/Gem Balance
5. Make every items of type rare or better have some randomized stats.