Id like to see destruction of key structures that are needed for easy access to places... take the example of last resort/zanzibar. The structure thats on the front of the main building, which leads to the laser spot, if the pillars have demo charges set and destroyed, the structure collapses and means you can no longer use it. but unlike most games, the destruction is realistic and the blocks and large pieces stay exactly where they land from the explosion.
this would add to environment and scenery and make every game different as cover constantly changes.
This should be set up at various points, but not only this, craters and blocks should "peel" off of segments all over the place, so that its realistic, but surfaces that are impenetrable like forerunner structures or covenant ship structures take a lot more to destroy.
this would make the destruction not a necessary thing, or something thats easy to do, but a commodity for use with teamwork, say putting all four team members charges on one structure and detonating is enough to blow it up.
that would be good.