Are the maps. Hardly any of them are symmetrical. This was also the case for Reach which made the maps suck camel -Yoink-. If u look at H3, the best maps happen to be the symmetrical ones.
I agree, I hope the mappacks have some sweet symmetrical maps. Or just add The Pit and Construct from Halo 3 and all will be good 
What about Haven, Ragnarok(sp?), and Solace? That’s 1/3 of the maps
What about Ragnarok? That’s not 100% but it’s very close.