Also, on reflection, I'm not so sure that the deposit insurance scheme would have made much of a difference to large depositors. I suspect that under Cypriot law the Cypriot government would have been on the hook for safeguarding the deposits below E100k and if there weren't enough assets left in the banks to cover those, all assets would go to the Cypriot government, and not a penny to depositors for their holdings above the E100k limit.
So then the question is whether there was more money in the banks than necessary to honour at least the deposits up to a limit of E100k. I don't know, but I suspect there wasn't.
AFAIU, the proper fail procedure is to use capital to cover the losses. There is a hierarchy of risk at the bottom of which are deposits. Laiki banks fails : high to medium risk capital sources are depleted first. Deposits are then used to fill the remaining hole ; all deposit accounts are depleted of the same percentage, whatever the amount. Then the cyprus state refills any account having fallen below 100k. I think that's the proper way of doing things.
Instead of that, the Troika (ECB+EU+IMF) tries to shove a first plan implementing a x% haircut on all deposits. Remember that the cyprus parliament denied that first plan ! Here they did their job. Then the Troika built a second plan, under which <100k accounts were to be moved to a good bank, and all other accounts were to stay and die. This second plan goes contrary to what had been promised to capital holders, and thus, is theft. Moreover, that second plan was designed to purposefully bypass parliament agreement. In other words, the EU and its two friends made their best to remain deaf to cyprus voice.
On one hand, I agree with you that cyprus made a lot of mistakes to dive in so much trouble (one the mistakes being to join the eurozone), on the other hand, I still want to point that once the crisis had blown out, the EU commited theft and various other lawless and unjust deeds.
To sum it up, in my view, the cyprus gov and the cyprus central bank are high-level thiefs, whereas the EU+IMF+ECB are grandmaster thiefs. Just my opinion.