I can't tell you exactly why the elements of the MSEP come together to "click", but they do. The music seems really well suited for the visuals. It does not come off prerecorded, but almost organic to the lights themselves. It's all about being electronic and yet the music seems childlike and delicate. There is no canned chorus of singers drilling a jingle about dreams and magic at 100 db. It is just this suite of tingling music that somehow fits what you are seeing and that's all. It is not over produced. There is a certain graphic continuity to the floats that makes them the sum of their own parts. All those lights en masse. When you see the whole thing coming down the darkened street that is awe inspiring. Abstract and truly dreamlike, the lights of the parade interpret the characters on it's own terms. Light Magic and other parades are more literal. Rolling meet and greets.
I was walking DL Main Street yesterday and compared to all of the other versions, it is the simplest architecturally. One of the ways to tell what has been added over the years, is that some additions seem overly ornamental (or out of scale) compared to the base buildings beneath. It occurred to me that part of the personality of the DL MSUSA is that it has a childlike innocence in it's modest simplicity. There is no Crystal Palace, no 2 story porches filled with gingerbread. It's Victorian, but at the complexity of a dollhouse, not a Gothic Mansion. It's small town appeal derives from being straight forward and plain, but warm and approachable. The scale of the buildings reinforces that. Sometimes in an effort to honor the Disney tradition of detail and quality, that simplicity gets trampled somewhat by well intended design. I know in the case of DLP, we were working over the design of the WDW MS and it was not really emblematic of a small town as much as a victorian resort community. Different emotional feel. We skewed it into being a hybrid with the billboards and Americana. It has a richness that is addictive and rich, but it never had the warmth of the "Mayberry" feel of the DL version.
Where I'm going with this is that the parades may have become technically elaborate, yet emotionally plastic and superficial (at least to me), versus the sincere "lighting in a bottle" captured by the MSEP. I heard once that great design happens when you have stripped everything unnecessary away.