Were the kids in any more danger than before they had the vaccine? I don't think so. Obviously they're in more danger than if they'd got the vaccine, and they were required to get the vaccines to attend schools, but that's slightly different. I guess you could argue that the non-vaccinated children were endangering the lives of other children in the school, but really the biggest danger is to the non-vaccinated child.
If there was no deception to the parents, then the biggest crime is falsifying records, which is what she was convicted of.
My bigger issue is that she is still allowed to practice midwifery/nursing, it seems, and her restrictions only prohibit her from administering vaccines (which she wasn't doing) or accessing the vaccine record database. She might be an old hag at the tail end of her career, but the fact that she managed to pay $150,000 suggests that she doesn't desperately need to continue working, and given her offense she shouldn't.
Edit: Apparently she operates (and probably owns) the midwifery clinic. No doubt she has money, apparently enough to pay for a good lawyer. She should have got worse.