The big take-away, is (for the umteenth time) if you give someone the ability to take your money, there is every possibility that they will do so. In Bitcoin-land it is a near certainty.
This doesn't help people who are caught up in this mess right now, but tvbcof is exactly right.
Third parties who hold bitcoins on behalf of their users will eventually lose or steal those users' funds, with a certainty that approaches 100% on a sufficiently long time scale.
Trusting third parties to store money is an unnecessary and dangerous relic of legacy currencies which should be abandoned now that we have superior alternatives.
Apparently fiascoes like this will keep happening over and over again until everybody learns this lesson.