too much text. SE- want to fix this game? want to make money? do this:

PvE (base it on Sky or Sea- pop items for stronger NMs for more pop items for better NMs)
Side content (Hamlet defence, colusseum, arena, chocobo racing, etc)
Chocobos (want them to be different? nitros like FF7 gold saucer or let us get off of them, kill, get back on)

secondary issues- make sure PvE has useful gear, not trash like quests offer
make sure we have NPCs that teleport us to Hamlet Defense and so on
make quests actually different from one another and offer something actually useful, like SP, etc
increase PT bonus SP so people actually PT... people are still soloing doblyns