I like the idea of having new Space Rangers shrink. That way they could become toy size! I also like the idea of making the robots on the ride three-dimensional. I would also point out that the ride does fit the "Tomorrowland" theme, especially when one considers the interaction with Space Rangers at home on their computer versions of the game.
Tomorrowland does need some updating. The "House of the Future" was one of Disneyland's best attractions back in the day, now it's nothing special. I'd like to see a ride or exhibit dedicated to the green world of the future. I'd like to see a Segway ride with a faster line, perhaps Segway look-a-likes on conveyor belts that give the same experience without the long line.
In any event, I like your thinking!