I'm not much of a PC guy but I mostly on the xbox.
If there was forge in halo 4 then what they should add is that you can make an object stick to a bunch of other objects and they can move to a area at any time you what and what speed it is like making a train moving and it can get players killed in any gametype what do you think?
[Edited on 10.06.2011 1:03 AM PDT]