^I do agree... while it's a really long segment, because it takes so long for that boat to get around, it's physically impressive to see a life sized boat with so much activity on it. Same goes for Mark Twain at the end. Without those, it's really not the same, as anyone who's seen the WDW/DHS version can tell you.
As for the dragon, while it is/was a huge highlight, the show for years had a different, much scaled down dragon. So the show could easily continue with an alternative plan. As had already been mentioned, this could be a blessing in disguise as an opportunity to make some improvements in designs... Murphy was notoriously temperamental from the get go. Could be an opportunity to make something more reliable with updated tech.
If Universal could turn around from their massive backlot fire, Disney can make something happen. It'll just take time.