Alton Towers (or any theme park) should not be about extreme "immersion", it's about creating a look and a design. X Sector was all about its odd shapes, futuristic architecture and secretive obscurity. Simple as that. It worked really well back in the day and I remember being surprised by the feel of the area - when it was all working. But it got so badly maintained.
Black Hole always looked fine and its look suited the area very well in X Sector's early days, because it was redressed on the exterior to be in the same design style as Oblivion. Once inside, the Black Hole inside was essentially a dark ride - so it really didn't matter at all if the style changed slightly on the inside. Same as if once ventured into The Smiler the style evolved. That's half the fun of a dark ride, yes? The fact that it was Jules Verny on the inside made it more fun, if anything, I remember loving the journey inside as to what could come next.
You're all trying to dissect an area that has been pushed and pulled around the place and misunderstood because the original style just does not come across anymore. It would have been easy to properly design The Smiler to be of very X Sector look & feel, but they didn't want to do that, they simply fiddled around with the rest of the area to suit the theme they were making anyway. By using WORDS ON SIGNS (is this fun?) and a fan-fiction-style disposable BACKSTORY that adds nothing to the imagination.
So it's no longer an area about VISUAL implication and a sense of secretive storytelling, because visually - it looks tacky and incoherent now. And so doesn't achieve the main purpose of a theme park - being fun and intriguing.
Visually, the Smiler is a concrete box with a track on top of it, with cheaply built theming. It's got some nifty visual effects though. The rest of X Sector was designed from the ground up very differently. If you do not understand this and think that the area has been the same quality and effectiveness as when it opened, then you have talked yourself into it - objectively the area looks tacky, messy and evokes no feeling now. Perfect for a restoration to its opening day quality! And forget the forced, boring MOJ "backstory".
Let The Smiler be The Smiler and Oblivion Oblivion? If one didn't look so cheap and the other so worn out - then visually they'd be a happy couple.