In my research, there are many disadvantages to modified LeFort 3 which is why it's done so infrequently. Requires a separate surgery, limits to movements, difficulty predicting movements, visibility and migration of hardware over time, general surgical risk, incomplete ossification, fistulas, ridges and unnatural contour. The main reason the industry moved to augmentations is that the results are better. Augmentations, of course, suck. CT-bone looks considerably better but, still, I'd wait until you're older just so you can at least offset some age related changes. Plus, gives technology time to mature.
However, it's unclear to me if this product is replaced by bone. If the scaffold remains in place, then it's possible for it to separate later with facial bone changes and that's not good. There's screws too, of course, maybe those can be biodegradable. Overall, it looks very promising though.