Welcome @weather_nerd!
The first step to success in hardboots is to get really good at carving in softboots. Can you carve your downhill edge?
What do you weigh? The Voyager is softer than the Freecarve.
Deeluxe boots really need the aftermarket BTS kit. Without them, the forward lean adjuster actually locks out the ankle hinge, and all flex comes from just deforming the shell. Yuck!
You may also need to add these pads to the outside of the liners to reduce heel lift, which is common with Deeluxe.
UPZ boots are famous for heel hold, and have a good spring system, but the stock liners are usually tossed in favor of Intuition liners, probably Power Wrap or Alpine. Deeluxe come with rebranded Intuition liners, and Donek does board+boot+binding packages with Deeluxe. UPZ RC12s out of the box are softer than Deeluxe T700s, and stiffer than 325s. UPZ offers tongues in 4 different stiffnesses if adjusting the spring system isn't enough.
Definitely get an extra lift kit for the F2 bindings (check the size). They only come with one. You want one under the heel of the rear foot and one under the toe of the front foot. You'll have better comfort and mobility. Start with no canting.
Good luck, let us know how it goes!