I had a new Mk4 R32 back in the day. The Konig seats they put in that car were brutally uncomfortable to me, and they were so hideously over-bolstered that you practically had to climb into them. Sure, cool for some I suppose, but eventually were a big factor in me unloading that car. Prior to that I had a GTI 337 Edition, which had spectacular Recaros. Now THOSE were great seats. As for the current seats in the GTI & R, I'm totally fine with them, and don't care that the R seats aren't different somehow, because I don't find them lacking in any way (OK they should have memory function, but I digress).
Your list of desired "upgrades" to make the car more special than a GTI or pedestrian Golf is quite ambitious and would drive the price into the stratosphere. At the end of the day, they're all still Golfs, and tarting up a bunch of stuff to impress your friends comes at a huge price that the vast majority of customers just aren't going to pay.