I would demolish the whole thing and start over.
Okay, maybe I wouldn't go to that extreme, but I'm definitely not one that enjoys this ride....and I LOVE movies and movie history.
As I see it, the first problem was that someone had some idea early on in the planning stage that they needed a guide to kind of replicate the success of the MK Jungle Cruise. But, for whatever reason, those corny Jungle Safari jokes always seem to work and the GMR jokes just don't. And I don't think it's always the case that it's the guide not being good at it, or even the material. I think it's more a problem of subject matter. No matter what kind of movie you like, everyone agrees that movies are cool. Corny jokes and stereotypical characters are what the worst movies are made of, not something that should be showcased as Hollywood's success.
A Great Movie Ride should either showcase the best ever movies (and just great Disney movies would be fine with me), or somehow make attendees feel like they are IN the great movies. A GREAT Movie Ride would do both.
I guess I would rather see a short history of film. Start in the queue area with silent films, etc. Then get on the ride, but have the ride take you through popular sets, but also have large screens incorporated that show more movie history. Add a host on screen like they do with Figment or Ellen's Energy. Maybe a treasured Disney character could be the host or even someone like Kurt Russell. Have some simulations that makes the ridegoers feel like they're flying through hyperspace or other great, recognizable scenes from movies.
OR, instead of going through movie history, have the car ride through different genres of film. So, you start with Drama, move to Comedy, enter War, then Animation, then Science Fiction, etc.