I too would love to see more interior statics. It's really the only aspect of urban warfare missing from many of the city maps. It would allow infantry a better chance to manuver through the city unseen, while adding a new element to CQB. On another note instead of having major cities filled with destructable objects, what I would really love to see are already bombed out cities, like the last scene in Children of Men.
In terms of Insurgent spawning, I've suggested using the ammo boxes as the "spawn prop" which could be placed all over the city. Now after a while, the U.S/U.K may memorize the locations of each spawn, but using the new "wave spawning" system, a new set of spawn points could appear around the city every 5 to 10 minutes or so.
I never said i wanted all the buildings to be destructible, i'd be satisfied if the slums and several buildings in a more urban environment were destructible.
it would still be nice to have the hotel/other large non destructible buildings.