I would like the ability to add my own content, weapons, armors, mod the scripts.. Right now I practially have all the gui's graphics replaced and replaced some of the annoying environment sounds.
Oh speaking of environment sounds the ability to turn those off or down.. annoying as heck to sit there terraforming while hearing a wood pecker spam its sounds... Until i fixed it.. I had to turn the sounds off to the game.. Thought my head was going to explode.