This is the outcome I want to see. Firing Mueller and/or Sessions is still too radioactive, but after the memo Rosenstein should go. Strike while the iron’s hot; keep the momentum going.
Since his name appears on FISA warrant documents that were submitted to a FISA court with information that was known by the investigating authorities to be false or incomplete, the following will likely happen (in rapid succession, if not simultaneously):
1. He will have to recuse himself from his oversight of the special counsel he appointed.
2. Since the Deputy AG has direct oversight of the FBI and there are now current and former FBI agents who are potential targets of a criminal investigation, he will have to step down from his post as the Deputy U.S. Attorney General.
...but after the memo Rosenstein should go...Agreed. The memo gives them ample cover to do this. I'm just surprised Trump did not ask for Rosenstein's resignation when he visited him about the memo at the White House a couple of days ago.