I think the 5th Dimension is a technical marvel and a fun surprise when it initially happens, but many feel Disney dropped the ball on the actual room. Non Theme Park fans won't realize the ride is trackless in that section, so that technical footnote is lost of most guests. Disney also doesn't use the trackless tech for anything showy. I mean obviously an elevator car moving from one shaft to another is showy, but it doesn't highlight the trackless nature in a way that trackless darkrides do with the cars bouncing around a large room in a seemingly random way without any indication where you're going next.
Well it's extremely clear we'll never see eye to eye on this. I think they made brilliant use of the trackless technology, in that it allows the ride to execute something you would never expect, nor would think even be possible from an elevator. The build up to it, in contrast to the other Towers, in how it functions like an elevator before leaving the shaft seemingly of its own volition only adds further to the surprise.
I suspect had they utilized the trackless technology in the manner you wish, it would have detracted from the experience.