That magic blood sure causes way more problems than it fixes. At the end of TWOK, it seemed pretty clear to me that Khan and crew were goners. Everybody was dead except Khan and then he seemed to succumb to his injuries shortly after activating Genesis. However, if he's got magic blood, he should've been fine. Maybe his crew died immediately, but what about he and Joachim? In about 10 minutes, they'd have healed. Kinda takes the drama out of it. I won't even get into the fact that death is now curable. Unless Starfleet just decides that it's too dangerous to wake up the superpeople to cure death, but it's clearly worth the risk. I think it's clearly worth the risk. You probably don't even have to wake them up to do it.