Why wont Runewords return?

I believe I read a while back that Runewords wont be coming back, right? I don't remember reading a reasoning for it (if there was, please let me know).. but yeah, why aren't runewords coming back? I understand that some were overpowered and may have possibly broken the game, but they don't have to be made as powerful this time around, and it was fun making runewords.