I'm going to take issue with your assumption that this was "all" JM had to do. Far from it. This was not his only case, nor was it the only case for any of JM's assistants, or any of the detectives working on this case. And I don't believe it was "all" he had to do anymore than it was "all" KN and JW and MdlR and their PI had to do. I think it was one of the things that a highly paid (thanks to the taxpayers of Arizona) PI did in concert with MdlR. I think that one of the reasons the DT's huge tab cost so much is that they did have people whose job it was to focus on the backgrounds of all the jurors in order to discover the slightest thing that could lead to a mistrial. I don't think synchronicity had anything to do with it. I think that the PI's (and to some extent MdlR's) mandate was to seek out all the available information about every juror and alternate chosen to be on the panel. IMO, the DT was holding onto that information in order to have a mistrial declared if everyone had voted for the DP. And, I would bet, they had information that could have been interpreted as damaging, no matter how innocent, on other jurors as well. I would love to see a breakdown of the money spent on the DT by AZ taxpayers, though I'm pretty sure that won't happen for quite a while, if ever.
As well, I don't think J17 felt intimidated by anything when she told the other jurors that they only wanted revenge by voting for death. IIRC, J17 refused to look at autopsy pictures, would not refer to anything but JA's fake journals and a made for TV movie and expected everyone to just go along with her. So, I think she may have been a stealth anti death penalty advocate more than a JA advocate. But that doesn't explain why MdlR tweeted the verdict on SM before it was read in court.
Jodi's defense cost 3 million dollars wheread the state paid around $125,000 iirc. .