That isn't up to the developers of AG. That's up to the game developers that make the games. A lot of the games on AG were made by independent devs which AG has no control over what kind of games they make.
Well let me tell you even asking a developer is a bit silly. As a developer ( I am an indpendent one) it is not as easy as just "ok you want an mmog ok, I'll do that." It is like telling a painter what to do or a sculpter how to do things, but even more so insted you have hundreds of people with differant options asking you to make this or that! It takes a lot to program, but I take a lot of skill to make a good program plus time and efort. You have to get inspirded, and when you get that inspiration it is better if you let it flow than wall it up in to a box...sherh you should make sherh it is up to standereds and does what is wanted, but game programing is no as easy as most, with apps like word prossesor you have other sett giudes that are a lot like yous and you make it better and fast and simpler but stronger, with a game people like new fresh idea, so it is like starting from scrach, and insted of a "this is how it work and has to be" guide or example, you got nothing but syntax and opinion on how to do things...
So just tell a programer to do this or that does not realy work.... Sorry for the long (but calm) rant... but this is a common missconseption....