Your argument does not follow. The 2006 movie overlay did very little updating of technology and effects. Besides adding the air effect to the Wicked Wench's cannons (which was one of the few positives of that overlay), most of the technology that had been there since the 1970's past that scene in Florida's WDW was not replaced. It was done exclusively to cash in on the success of the movie series while expending the least possible effort to do so.
The Paris POTC is an example of how relatively modern technology and effects enhanced a classic ride. Some scenes were shuffled around, but the basic premise of the ride is still intact. Things like those great sword-fighting AAs added to the Imagineers' original version, rather than clash with it. If they had brought effects like that to Florida and added no movie characters, I guarantee no fan of the original ride would be complaining.
Tacking on movie characters did nothing to preserve Walt's legacy, as you say. It totally changed the narrative of the ride. While the credits for the POTC movies say that they are based on Walt Disney's Pirates of the Caribbean, that version of the ride doesn't really exist anymore. POTC was famous as far as theme park rides go before the first movie, and it never struggled to draw a crowd. In the interest of respecting the brilliance of the original Imagineers who first built POTC, Disney should have taken the opportunity to use the movies to generate new interest in the classic ride. I think the movies and the ride should have remained separate entities, and Disney should have built an attraction that was more appropriate for the movie series to capitalize on the success of the franchise. Instead, they went the cheap route. They messed up one of the greatest rides of all time, and they attempted to exploit the success of the movie franchise in the parks while putting the bare minimum of effort into doing so.
