First I have to say that i do love some of the new features to forge, such as magnets and quick item duplication.  However I can't help but feel somewhat limited by the lack of availability of certain items.  For example only 8 Warthogs, Mongeese, Ghosts, Etc.,  per map.  Certain custom games require the 16 Vehicles on the map (like bumper cars).  As many are wacky and stupid fun, to give everyone a break from the matchmaking MLG mentality; and kill each other in more wacky and stupid-fun ways.  One more thing for now, a UNSC aerial vehicle, that operates similarly to the falcon or hornet would be a good idea to bring back.  Though I don't know how feasible it would be a this stage of the game, though if its possible; it bring back one of those elements of gameplay that have been lost in Halo 4.