Agree totally on outdated rules! I was trying to go from xenon low/halogen high to xenon low & high and ordered a complete housing from Poland but it was damaged in transit. I backed off it for a bit but it is still on the long term plan to do.
I did do the conversion to the Euro tail lights. And here is another example of VW's strange decisions. The LEDs for rear fog lights are installed on every NAR Phaeton in the inboard position, but the controllers in the outboard tail light assembly are different between the Euro and NAR and no rear fogs for us. Change the outboards to the Euro ones and bingo the rear fogs work perfect. They even had to take the effort to make the button that is for the rear fog lights in Europe into a "valet" button in NA. With a different marking and part number and everything. Why couldn't it just be there from the start?
So I am mixed on if the matrix hardware will be there or not.