I don't like GGG, even if I go there sometimes. It is nice, it gives free wins to your creatures and it helps in the beginning of MP5 but.. it drains all the people from the other areas of the realm. You wonder why don't you see anyone awake? They are all there. And, as it had been told before, you will learn nothing there (I wonder how many of the all-time GGGers could give working solutions to Burns' race quest). It is also in a place far away from normal areas.
So, I voted yes. However, it is unlikely that it will just disappear. So, how about relocating it? To a place.. closer to civilisation?
If you are afraid of the big bad veterans who come and beat you, set up a few trees. You might gather a few losses, but you won't have to heal your creatures all the time.. and you can farm the people Burns mentioned to get victories (including me).