Does anyone know when Lufthansa releases its F rewards to Star Alliance Availability?

Following everyones advice I booked a mini RTW in May before the points went up.

Now, I am looking to rebook at 330 days out and can find no F availability to North America between 280 - 330 days out. I am looking for two seats FRA-SEA or similar (DEN, ORD, EWR JFK, BOS etc...)

I asked this in the LH forum, but got really nowhere since everyone there is booking with Miles and More and they seem to have a very easy time getting the seats that they want. I just got the advice to book on less popular routes (DFW, IAH) which does me no good since there is no availability there either.

I notice Swiss is loading at 300 days out, but really wanted to experience the FCT in FRA for my first time.

Advice?

Conspiracy theory in me suggests something is going on since I had very little difficulty at 330 days last time, now I can not find a single seat!