Eureka!
I figured it out!
The trick that worked is to use Apple Motion. Select the sequence in final cut and choose “send to > Motion Project” This creates a motion timeline with all of the linked images from final cut.
In motion, the images all appear as subclips of one layer. I then rotated and scaled that layer to the size I needed. Unfortunately, this didn’t seem to preserve the resolution of the source images. They still looked as if they had been scaled up.
As a last resort, I dragged the images out of my rotated and scaled layer into the motion timeline to create their own layers, and suddenly Voila! The images popped into full quality, and retained all the rotation and movement data from the original final cut sequence!
Magic! A bit of a convoluted workflow, but it works and saves me a lot of headache.
Hope that works for you alw0311
-Matt