Per CNN reporting just now, William Barr before today told the White House that he would be bringing in his own Deputy Attorney General if confirmed, so the news that Rosenstein will step down if Barr if confirmed should not have led to *any* of the hysteria it seems like it has.

2/ Rosenstein previously said he'd serve two years—so his departure around now isn't surprising anyway, and (in fact) will make it easier for him to coordinate with Mueller as a witness rather than a supervisor. Too many people are reading way too much into his pending departure.