Growlith1223
Pixel Pirate
It would take basically a rewrite of the entire game, though, and the devs don't have that kind of time.
Hmm... that sounds very familiar... *cough cough* Terraria 2 *cough*
They said that because of the limitation of the game itself (problem with the code etc.), Terraria couldn't be as they really wanted it to be. They could but it would need to redo all the code of the game, so that's why they're planning to do Terraria 2.
EDIT : NINJA'D !
That is true im just saying. Not like i could ever help with this though xD