There is no appeal to it, as you mentioned the hype at the beginning was big, there was thousands of players everyday, they even had to open two more extra servers because of it, of which last year both had to be closed due to how empty they were.
After time (the first 5-6 months), they started going heavy into p2w events one or two every month, many people lost interest playing, slowly and slowly now its 2 and a half years later, the last few people left playing are the ones that have invested too much time or money into it to quit, we can say both actually to be fair. The p2w its not the biggest problem, there was several game updates or game changes throughout time that were straight horrible, which also pushed many players away.
So once all those people who decided to leave the server, also left empty farm spots behind, which were quickly taken mostly by other old players, making them self alternative parties to farm more adena or straight up 3rd party software users. That is the reason why now you can see quite a fair bit of players having 15-20+ characters (some up to 40-50 chars) made just by them self and i cant blame them to some extent the way this server is designed, its almost a must thing to do, making any progress takes a lot of time if you choose to farm with main party only.
The bad management (things i said above) as well as pretty much the non existent anti bot policy, there is bots that have farmed for months if not years, without being disturbed at all and the fact that there is almost no feedback from the GM have led to what the servers are today.
My advice would be pack your bag and dont bother playing, i wouldnt advice playing here to anyone the choice you made the first time was right.
To answer your question about lvl60 and above, no things dont change i would say its even worse, all the good or somewhat good spots are taken by people farming with alt parties (leaving you farming at the worst zones), so that they can support their main parties and continue farming, and are strictly protected by permanent PK chars, that loggin very fast to take care of you, in case you try doing things. Putting any fight against them would be extremely hard as they have been doing this for years, they obviously have much better gear than what you can afford/get and outmatch you heavily.
From what i know from other players, people use 3rd party software even at sieges/epic rb fights or other similar activities so i wouldnt call it "active" by any means either.
In any case best of luck my friend, hopefully what i said is enough to take the right choice again.