1. CV's don't like agressive angles - causes them to wear out quicker.
2. Your CV's have 'worn in'. With the lift, your bearings inside the CV will run at a different location in the outer race (green cup). The bearings moving into & out of that groove may cause them to fail.
3. The agressive angle of the CV will probably cause your boot to split or even tear in two. That's the most common problem lifted VX's experience. If you don't catch it immediately, the joint will run dry & fail.
So far, there doesn't seem to be much promise that aftermarket boots really last any length of time with the agressive angles. If you go that route, let us know how it works out for you.