@glens - very well said, I couldn't agree with you more.
All of the VPI tonearms have the capability to adjust VTA. The more expensive "on the fly" tonearms simply make it easier to perform the adjustment. With the non "on the fly" tonearms you are simply required to loosen two set screws, make the adjustment using a thumb-nut and then retighten the set screws. VPI suggests that the "on the fly" VTA be made per one's listening "taste" instead of adjusting the tonearm so that it is parallel to the vinyl. Either way, it's an easy adjustment and not rocket science.
If the uni-pivot mechanism is too complex or has inherent design problems I've never experienced them. If you have a humble opinion or have experienced "issues" with the uni-pivot arm then you must have owned one? No?