I tried to figure out why I like this forge so much, when so many people are complaining about it. I figured it out. I was one of the original forgers. I was there before halo 3 even had the heroic map pack. Before foundry, and it's mass of object and flat space, we were hard pressed to make something fun on Sandtrap, and yeah, we did it. The creation of foundry was a godsend to forgers like me. All that flat space, and the huge inventory, was new and exciting. Then came sandbox. If the foundry was a godsend, sandbox was like 3 of them. Even more space, a gigantic underground room, and a freaking skybox. That skybox was actually needed to make decent floating maps, cause that was before the days of even fixed item positions, let alone phased ones. Phasing objects was hell.
Then came Reach's forge. It was like nothing I've ever seen. Tons of open space that wasn't even needed. That's a key part. All the good maps were put into one section, and can easily be done in the maps we have in halo 4. Anyways, open space, and even bigger item list, freaking phased/floating objects. It was everything a classic forger could have asked for and more. There were things we didn't even think of implemented into it. Colored mongeese. Item colors at all. Advanced labels. This stuff was just crazy, and I loved it.
Now there's halo 4. They have magnets, which, used with rotation snap, can make really quick maps placeable in minutes, compared to what we would have to do in halo 3 for the same effect. There are even more objects than reach, when you include the map specific ones. Not only that, but the base game has 3 forge maps, each with their own set of objects, and an entirely different look to it. No longer is it gray all the time. Each map has an entirely unique feel. We've got Erosion, which basically has a coliseum, a natural area, which is fantastic, and a large open area that people will not admit exists. Just put down a floor over there, and you can build some pretty massive stuff. There's ravine, which has a nice grassy area, a very unique ravine (something I haven't seen done well in a game) and a forerunner building, if you want something done easily and fast. Finally, there's Impact. It's practically nothing but a large empty space, but you can still build something on the floating chunks if you want. The tunnel pieces unique to that map (i can't remember the name) allow for an easy modular build. That alone presents so many options, and people are just ignoring it. Again, put down a floor, and you've got tons of space to build on.
I think the key difference between people like me and the people finding all these things to complain about is this: we've gone through all the phases, all the way back to not having any of this, and we liked it. There was no room to fall for us, only room to grow, and grow it has. Halo 4's forge is amazing, if you just know how to use it. Anyone who disagrees should see the remake of my old halo 3 gametype I did. Everyone who's played it so far likes it.
Custom games is another story. A lot of that has been botched, I will admit.