I believe NASA is still under contract with TOYO for 2012, while the SCCA's ends this year. So it was not possible to have a tire manufacture change without one series being left out, even if they want the change. We'll just have to wait and see what NASA chooses to do for 2013.
It would be nice if both clubs would let you use of left over tires from the year before if you wanted to. it even will get more expensive if NASA goes to a new or different tire and your sitting on two sets of decent RA-1's
Loved it when the plate Weight and RP was the same too.