Why stop there? Do it to all zones.
Not to play too much of a devil's advocate, but you do realize how much time/money/effort is needed to actually remodel or recreate an entire zone? :x Even if they built it out of a set of prefabs/pre-created set pieces this is still far too much of a serious effort for anything less than a catastrophically bad zone I would assume.

Addendum: I actually rather like most of the zones in the game, though that wasn't really my point.