Lords of Waterdeep’s @wotc_rodney on rapid iteration: “save the fancy prototype design for after your game is done”
http://www.wizards.com/DnD/Article.aspx?x=dnd%2Fdrdd%2F20120321#79250
RT @SA_Liberty: This is a mistake I see amateurs make all the time. Your prototype will change every time you play it!