Could you link the most recent reports of the Skyliner having the "same old problem"? I haven't seen many (not really any) recently and when I personally rode it over the course of a week and another weekend I experienced one stop (for loading an
ECV at Riviera) for about 50 seconds. Also to what Walt planned with the monorail, he planned for innovation not static ideals of an original vision. I'm sure with new innovations in transportation Walt would have wanted to explore those, in fact his monorail installation was just to show they could be used for mass transportation, one could say installing the Skyliner is more true to Walt's vision because again its an exposition of what a gondola system could do for mass transportation.
Unfortunately we live in an evolving world, what guests wanted 15-20 years ago are different than what guests want today (in fact the predominate audience is changing each day). But we should all hope that WDW remains a place for imagination and letting yourself be free to your inner child, but how that is achieved unfortunately can't stay the same else WDW will die by stagnation.