SWTORfag here, I have few complaints about the game, for the most part it's very good, but then I'm someone who only wants a really really big RPG with a world that feels lived in, and not constant socialisation and massive group coordination. MMOs in general are stuck with very hard design problems, especially if they don't go the "just a big RPG" route.

There's the dilemma of wanting group content to be challenging vs wanting it to be easy to find a group. Sitting around saying "lfg" is absolutely no fun, and being locked out of something because a group is mandatory but nobody is doing it also sucks balls.

Then there's the content bloat where the original cohesive design is lost and little exceptions or issues pile up, because devs are never thorough about these things, and often they don't know anywhere near as much about the game as the players.

There's the issue of bringing out new content without making old content worthless. There's the issue of taking the story in a direction that isn't "it's the ultimate final threat to the world for real this time guys".

And of course the hardest is avoiding shitty monetisation practices. Shit like dailies and reputation grinds in to pad playtime, level boost tokens to get to endgame and invalidate the entire RPG aspect, and microtransactions of xp, currency, loot boxes, cosmetics, etc.

In general the perfect MMO would need a highly competent dev team to do way more work than normal in order to extract way less money from players than normal. That's why the genre is in this sorry state.