LOL, obviously you've never played on any other WotLK server, you should do some research before saying something like that :P
Even Kaer admitted on the live stream that Molten isn't the best anymore.
But it's still kinda enjoyable, the huge community makes up for mediocre PvE scripts, even tho it's nothing like it was before. 3-4 years ago people seemed nicer and more social, now they only care about ninja'ing BoEs, having BiS gear and HC achievs.
Maybe because there's no other worthwile WotLK server :P
There really isn't, all the other ones are either very well scripted, but empty (800 online at peak, lol gtfo), have some custom **** (like transmog) or are 99% russian.