so i know i might get some hate from this but the thing is that 343 didn't change too much in the forge system.
there are the same building blocks use to build things in the game and there is only 1 map where you can actualy use all the items you can build with, and the 1 map isn't very big. That means that you can't build much if your space is limited as much as it is as it is on that ONE map. you can't have more than 4 custom trait zones. I know that you can have up to 16 custom trait zones but you have to set them on iether, alpha, bravo, chari, or delta therefor only 4 custom traits.
So i guess what i am saying on general is that 343 should have put a lot more time and thought into what they were adding, and how they were useing the new things they added in forge, and about the old items they look nice but i would of liked new items.
p.s. 343 sould add buttom activated doors and bridges to use in forge
