Some great ideas so far.
It's a shame WDI or whoever decides these things can't seem to break it out of the usual format of what a D or E Ticket must and must not have and at least improve the queue. They do all these surveys about guest satisfaction, but I'm sure adding a few extra props, some extra signage, maybe even some of those small closed circuit monitors the director watches on a movie set would make a massive difference for WDS. All Maarten's ideas are great.
The attraction scores generally good on DLRP Review, but the major major complaint is the bad queue. My own bit of Imagineering would be to turn it into "Dory's Film School", since she's weirdly missing from Crush's Coaster. She's going to pass on some of the tips she learnt whilst on "Finding Nemo". Only, they're not very good... and she keeps repeating things and forgetting things. Just have her pop up on various small screens and maybe install a few closed circuit cameras, so you can see yourself on the screen and practice your facial expressions.
That would cost, what? A few hundred Euros? Maybe into the thousands for a decent voice actor and new animation. Forgive the pun, but that's a drop in the ocean compared to even a single day's park ticket takings at the WDS gate.

Oh yeah, "Backstage sighted" - that reminds me, COVER UP THE GAPS IN THE FENCE! I was beginning to think as I watched every Disneyland Park CM walking over to the costuming building that they'd left massive gaps on purpose to make the queue more interesting. Grow some extra plants or cover the gaps with extra wood.
I love Maarten's idea again of a longer queue, more spread out. If they pushed the queue further back, there'd be enough room at the exit for a ride photo stand... kerching.