i think the core of the very core problem is just tos reach its endgame.
the fun adventurous journey is pretty much end already, to be continued, or probably theres only extras story and the rest of the game is just grind, and to me its the worst kind of grind genre of instance dungeon which is so boring, lacking social aspect, and tedious. isnt this game marked itself previously as open world? even though its segregated by area, it still was, but it doesnt feel like one ever since they go full dungeon on almost all feature including field boss raid. there was even just like originally 5 zaura and gang iirc?? then they cut it into 2 skia and the butterflies?? to no field massive raid action at all as they turn it into dungeon style jsr. the only big scale pve is probably guild dungeon and its not accessible easily and its still pretty much a dungeon. thats pretty sucks for massive multiplayer game for having no big scale accessible pve raid. big pve scale public raid does matters, it shows the game population, also its cool place to flex your progress.
Also have you ever watch soap operas where they just adding more characters and uneccessary story while the main story is actually end or just postponed?? its not even relevant to its title anymore. its pretty much what happened to most mmo that reach endgame including tos, like mabinogi for example you will heard the same complain in its forum that they made the game easy, theres less things to do and so on.
especially if you compared the game to lost ark, which is fresh for some, or maybe not for others, cause actually its just a fresh arena to show off how fast you reach endgame, how much you willing to pay, gain fame, and in the end you will meet the same boring grindwall.
tbh the euphoric moment of most recent new MMO is pretty short because most of them are rush game. like what happened to new world will most likely happen to lost ark as well. its just lost ark definitely has more contents to offer since its been existed 2-3 years already and if any bad decision was happened in the past, in another server, they couldve at least prevent it on this one and most definitely provide better experience.
but at the very core, its the same. at one point you will eventually get bored and move on. if you arent, majority will.
imc should get a clue, either they build that tos mobile and make it right, or at least better than beginning of tos pc, or just develop tos 3 and start fresh, keeping all the goodies, players favorites, and most definitely better game management.