Keep thinking about the Hollywood Backlot. More then anywhere else it bugs me... finally figured out why. It is a weird blend of "backstage" and "onstage". It was an attempt to put you on a movie set be depict the streets of "Old Hollywood". Personally I think they should ditch the "backlot" and make it their version of Hollywood.
Hollywood has a Walk of Fame... the Hollywood Stars as they're called. I think Disney did something similar but I can't really remember. Really simple, make stars for the various Characters that they have made over the years... they should have more then enough to make a decent star studded walk around the entire "land". Park vintage prop "cars" (not real ones, fiberglass) of the 20's and 30's which was the Golden age they were shooting for. I would also add a theater similar to Mann's Chinese with the classic hand prints and signatures in cement. That could be a variety of characters and imagineers. eventually becoming a tradition like the MS Windows. Top it off with a red carpet line to take your picture with Mickey and Minnie or any other of the characters.
Just a thought