Forbidden Valley is more of an 'active' battle scene, The Phalanx are there because there's a battle going on. X Sector is the slightly more glossy 'government facility' - it's more clinical and organised.
To really differentiate the two areas going forward, X Sector needs to be kept in pristine condition - to maintain the idea that it's a state-of-the-art facility. This would mean the park will need to keep on top of regular maintenance - it won't be able to use the mantra that other areas of the park depend on: 'Scruffiness adds to the theme' (Original Nemesis, Dark Forest, Rapids and to some extent Wicker Man).
I think they need to maximise the use of things like comical amounts of security cameras, fresh concrete, red flashing lights and occasional (quiet!) sirens.