I think the other map they will take out is Summit. It's nice for spawntrapping and boosting.
HC Demo, have instant spawn. So the player, if spawntraped, will die like many times in a row, because of TREYARCH fault on making spawns. So treyarch go and see hmmmm lets take out these maps so ppl can play better. HQ the spawns change if ppl start to "spawn trap" but demo no. thats it.