Well, sometimes I have the impression that FTL's do get treatment that is equivalent to some *Gold perks. My bags get oftentagged as *Priority although I'm only FTL. I once asked why and I got the answer "We know that you need 50000 miles to become FTL [at least when you are based in Germany] while other * carriers award *Gold for that much mileage. I think you just deserve it." :-)
But talking about another level etc., yes, I'm in. But what about german SEN and their 150000 initial miles requirement? Should they become something like "Super diamond" etc.?