SMD,
Of course you know I'm not a lawyer, and neither will I pretend to be one.
I think JJ, based on prima facie, is allowing Micron to see the same documents that Hynix saw, including those that IFX saw. When, and if, Micron presses for a dismissal based on spoliation and unclean hands, then Rambus can, and I'm sure they will, ask for CE based on JW ruling.
That is why I see little significance to his latest ruling. He is just being fair. From his point of view, it is possible that Rambus's destruction of documents affected Micron in different ways than it affected Hynix. But, we know better.