I appreciate and agree with the sentiment of wanting a more... For lack of a better term "traditional" dark ride.... But that's not what the lab ride likely would have been anyway.
Think about it: your main character is an animated strand of DNA. That right there guarantees a decent chunk of screens and/or projections. And let's be honest, they weren't going to fill a lab with actors and sure as heck weren't going to give us a room full of animatronic humans. That's never been their style and never will be.
So I'm sure the lab sets would have been nice to look at, I'm sure it was going to end up being more screen-y and project-y than some would hope.