Less power, more reliability - so what if some sh*tbox passes you? It isn't racing. Nobody is handing out medals. Honestly, don't get sucked into that game, that's for people with sponsors and bottomless pockets.
I'd ditch all notions of stage 47++, and stick in a K04'd lump with linear tune and be happy in the knowledge it'll do 100,000 miles with no drama.
That isn't meant to sound harsh, or anti-whoever is doing the tuning - I just think the whole point of owning a car like this is being forgotten. Just enjoy it.