Yesterday's Child
Sure, Spaceship Earth is a classic that shouldn't (and probably couldn't) undergo any major changes. But... how about leaving the ride track layout the way it is now, but instead of the omnimovers, install Indiana Jones/Spiderman (Universal) type cars to "juice up" your time travel experience. The ride would move along faster, and the designers could point you exactly at what they want you to look at.
Also, the "transitions" between time periods would be much more dramatic. Instead of a peaceful stroll into the next era, the time machine would actually "jump" into the next era/show scene.
Imagine how exciting the descent at the end could be given the ride technology currently available. I don't mean a "rollercoaster," but rather a "hovering through time" effect.
Okay, before everyone tears up that idea, it was just a thought.
On a more serious note, I think that the ride could be much more effective if "overhead" space was taken advantage of. Many rides don't need to pay as much attention to what guests see above their heads - if the rides are moving at a decent pace. Spaceship, however, moves so slowly that guests have a chance to see 'everything,' including lighting rigs and other technical equipment that may deminish the magic. There are a couple scenes in Spaceship that place props and scenery above the rides, but they are few and far between.
The props would not have to be elaborate or expensive. Just think about how effective the scenery is inside Splash Mountain. Rather than a naked ceiling above the riders, there are tree branches and greenery that really "engulf" the riders. This type of set design, in my opinion, has the greatest effect on the riders.
Heck, even Pirates incorporates the most primal method of ceiling theming by 1) painting it black (night sky), and 2) creating the "cloudy" effect with lighting and projection.
My least favorite? Small World. When a ride has the same type of ceiling tiles that my elementary school had, there's not much special about that. Granted, the ceiling at my elementary school did not contain all the colors of the rainbow. (Some of them, however, did display stains from water leakage - similar to those in Small World.):lol:
Timekeeper