First off, welcome to the forums! I'll try to answer some of your questions.
I don't know about the gamersgate question, I'll leave that one for Chris, the lead programmer.
As far as how big the world is, it's infinite. The world is broken up into continents, and as you defeat the overlord on one continent, another one is created. There will always be more continents if you want to keep playing.
We do plan to add more characters, that said, there are female characters in the game now, and many different looks/types now. But, in order to use them in-game, they have to be unlocked. This is done usually by rescuing NPCs during missions in the game.
I hope this helps, let me know if you have any more questions.