Mueller is just trying to take the focus off himself, because he knows he has "0" evidence to support his indictments.
Putin doesn't have to send the individual Russians back here. Mueller filed against three Russian businesses too and they have hired lawyers here in the U.S. to represent them. Those lawyers are demanding the Mueller either put up (the evidence) or shut up. He's trying to buy time by pointing the finger at JA again. If he had anything, he wouldn't be doing this.
It doesn't matter as far as the individuals are concerned. The U.S. has no agreement with Russia, so they can just ignore those indictments and it's like they were never written. Like I said, they were only eye candy for the anti-Trumpers anyway to give the appearance that Mueller was doing something… anything.