I haven’t been given my Halo 4 LE copy yet (I live in Spain, ordered it from Amazon UK, already dispatched), but I can say it looks much more balanced and fun than Reach ever was.
IMO, all you have to do is to keep the playlists simple and edit them when necessary, Reach ended up being a mess where you’d never play DLC maps because of not being there playlists exclusive for them.
I just can’t wait to put my hands on the game, and though I’ve been told some Spoilers (thanks to those that just CAN’T write SPOILER in the title of your posts), I can bet I’ll love playing it.