Sure, there's always something you'd like to revisit. Others are perfect. At WDI you got the chance to do that to a degree as I did propose (with David Mumford) a whole (unbuilt) enhancement for the 20th anniversary of Pirates. We came really close to getting real fire in the Ship cannons and some new Armory explosion effects. pretty much upgrading the existing show, not adding much in story. Skeletons on the up ramp did eventually get in there to wrap up the "Dead Men" idea. Getting paid to add stuff and knowing you don't want to betray the original was stressy and yet thrilling.
I always (since I was a teen) thought Snow White, being the first big feature, would make for an amazing E ticket attraction. Maybe it starts outdoors with a real cottage and forest? Part of the motivation for doing Pooh in TDL was the idea that the dark rides needed reinvention and we took the ride system to a new level and mixed real sets. We tried it all in that show. To me, that meant an "E" execution of a kid targeted property. Those features are your biggest franchises but because the audience is so young, they only building something "good enough". Jon Georges, who was the producer with me on TDL Pooh, understood that, and is now working on the Snow White Coaster for WDW. I'm sure it will be great to look at and ride. I love the dark rides, but why lean on plywood flats when you can really do more and create those worlds? Mermaid is a grander execution of a feature but could use a breakthrough in stagecraft. As you mention and we covered earlier, "Peter Pan" is an even a better choice, as the hidden desire to "fly" is literally in our dreams. Alice is another, which is to explore the unknown. "Fear minus death equals fun"!.
Worked on some DL redoes in the 1990's that were fun to develop and yet existing constraints made them challenging.
I proposed a new TSI with the whole Jean Lafitte overlay to it. It also overlaid the Mansion. More Pirate adventure and history. Tried to add a talking interactive DLP Dragon to the castle walk thru at DL. Believe it or not, pitched an AA Walt show once for DL. Not using him as you might expect either. Was not afraid to try things that could be sacred. You never know till you draw it. Pitched doing an "Ice Cavern" Restaurant inside the base of the Matterhorn once and add the Olympics to the theme. The Piranha pool did finally get into the JC, but not the Croc attack. Good thing too. Too "Jaws" like and too many little kids love that ride.
There is a simplicity in those black light shows that I do love. There is a simplicity and childlike elegance in DL's Main Street too. Not an ingredient to be overlooked. They are just enough to take you into their world and maybe that's why they work. I thought the Toad of my childhood was perfect and they ruined that train effect later on by adding more effects that light up the room. "More is not always better" my conscience tells me. Design for it's own sake never lasts.
But you never want to take your audience for granted.