There are a few things on my wish list:
I'd like to see more story-based games. Not just scenes from a movie shuffled into a random order like Star Wars, but gameplay that tells a complete story with a beginning, middle and end, where a player's choices effect their consequences. Getting a high score doesn't interest me - I'm way more invested in completing a quest or a story line.
A departure from the standard fan layout. Any departure at all, really. Even a game with Bally-style reverse in lanes would be fantastic.
A mechanical, interactive playfield toy. Think MM's castle and POTC's ship, rather than a passive sculpture like Sparky or Gene Simmons. It's been over a decade since we had a really good, innovative and engaging toy that's fun to interact with.
Save Multiball for a special occasion. It should be something that's earned and able to be achieved once or twice per game. Looking at Star Wars videos, it seems like you're in a Multiball setting about 70% Of the time, which seems exhausting and frustrating.