Thats actually what bugged me so much about Destiny, and why I sold it 3 weeks in. Bungie didn't know what type of game it wanted to sell to people
Not a true RPG, not a true MMO, not a true FPS
Jack of all Trades, master of none.
To me, MMO mechanics are FLAT OUT GARBAGE.
The only reason people tolerate limited weekly locked content, timed raids, rescaled economy, rescaled weapons etc. is because it keeps a level playing field in a persistent world server.
Destiny has no persistent world, and no permanent shared servers. There is no community at all, except off-console sources, and there isn't even adequate matchmaking. Theres no reason to limit the experience by this typical MMO style.
The actual gameplay experience is a pretty fun, Halo Co-Op style action.
But the deliberate choke-points of content, and the endless rescaling of economy/weapons makes any achievement meaningless, because your just stuck on the treadmill
I can pretty much agree with all of what you said.
I just find is really confusing how some games/developers get away with promising and not meeting expectations, while some are chastised for it.