I would, personally, have to admit that Graal Kingdoms has lost a lot of it's appeal - atleast to me.
I don't account this to poor staffing (Although, yes - some superbly dedicated staff assigned to very defined jobs would help, but you could say that about any game, I'm sure). I personally believe it's a very simple problem.
When you enter upon a server you enter without any previous knowledge, except a few amazing things people have told you, and you want to learn the most you can and become the best, or atleast become recognized (Perhaps that was just me...?) - and in doing so you consume yourself with learning about the entire game.
After you've learned all of this you discipline yourself with achieving these goals, sometimes they're so grand certain limitations stand in your way, sometimes this limitations are as grand as your designs - server rules, bugs, unfinished work, etc. Sometimes the thing which prevent you from achieving your goals is an other player...
Once you'ce accomplished so much you start to see how easy it is easy to do certain tasks, or you see how impossible it was to achieve... and you lose interest. I don't believe you can place this loss of interest solely on the game, just because it doesn't amuse you anymore.
But that's just my 2 cents
