I worked at the hotel that housed the creative team for "The Lion King" for the pre-Broadway run. I got to see the show a number of times...including once sitting two rows back from Michael Eisner. Each time, the show was different because it still was in development. The first version was over 3 hours long. Another time, the Pride Rock set piece broke and the show had an unplanned intermission.
Seeing a show in development is a unique experience. That said, I can understand the desire to wait until the show is complete finished.
One thing to note is that touring Broadway shows are typically "smaller" than the original version. The sets are sometimes different to accommodate travel and the need to fit into various sized theatres. If you want to see the (near) final version and don't plan to go to New York City, a trip to Denver near the end of the run is the way to go. You get to see the original performers that way, too.