FWIW, I don't believe Shell has made any announcements regarding the T6 oil yet. They have talked about the new, improved T5 and newly named T4 and say that it is CK-4 ready. They're just waiting for December 1st to label it as such.
I don't think there is a "new" T6 yet. When it comes out, it may or may not have lower phosphorus and zinc, but I trust that it will be good stuff, regardless.
Edit - the T6 info available is still comparing T6 CJ-4 to the old CI-4+ stuff. Although, they do show the new bottle in the photos.