The UCA could in no way lift the ride height of the car, and the knuckle would need to move the hub location down into where the lower ball joint is to have any effect on the ride height. Ford says they are different, but I would bet that it pertains to alignment at the new ride height, and maybe steering arm location for the same issue, and nothing more.
My comment was about why a company with a reputation to keep would take more time to understand all the specifics of the platform before releasing any product. There is a divide between "looks like it works" and "everything is measured to be within the parameters we designed for the part and it's operation."
"If you're not measuring, you're guessing." There have been some numbers thrown around for components, but I haven't seen anything put together in one place to make sense of it all. Just the same tribal conjecture that seems to endure.