Krug is stil available in the bar in the AM lounge in DOH. If you order "champagne" you get the Billecart (still highly drinkable plonk) and if you ask for the Krug you get the Krug.
Also, if you are me, and walk in, the bartender remember my repeated visits over the last few weeks and just starts pouring the Krug...
Another datapoint is that a crew on a recent segment: there will be a major, mind expanding refurningshing of the business product in early january. Or as I then interpret it: look for a minor refresh, the person did indicate that the miserable champagne in J is going away.
-A