How? The North has the police control room near the NW corner, and the media room next to it. The South has the executive boxes in situ. Oh, and don't forget the sloping roof.
No it's not easy. Certainly not for the Albion, the stadium's design and structure will not allow for any further expansion. Then you factor in the original planning consent for the number of fans attending in relation to transport requirements, God knows it's problematical now on occasions...