Do you want to know about the new presets work? Or a particular one? If you want to know the mechanics behind the presets @brakewind723 is the guy. Just start a conversation with him or he will reply here if you tag him with what preset you want to know about.
Hey Jamong, just go and make a new game and try each. Best way to see what they are and if it is something that you would want to expand on/make your own.