Well I thought REACH was a joke, forge world was ok and I really like the new forge maps especially Revine and Impact in Halo 4, but the main reason they are smaller maps is to greatly help REDUCE frame rate for serious forgers. I can not even count how many times me and my friends had this problem and especially the texture's of the REACH pieces were horrible. Race was ok for forge world but building a solid map lacked because of frame rate . IMO Halo 4 Forge is a little more focused on more serious forgers, but whatever.