[Underminer]

Dollman vs. Demonic Toys is my favorite amongst shrinking movies (Nurse Ginger in the kitchen drawer, rrrawr!), and I liked Innerspace a little more than most. As far as process goes, there's very slim pickings.

As far as missed opportunities, anything involving magic or mad science can do shrinking. I'm thinking something like The Magicians on Syfy or one of the Doctor Who spinoffs would be prime for this. Olivia Taylor Dudley shrunk... mmmmmmmm...