Euro is one of the strongest currencies in the world and even if it falls a little bit, I don't think it will become that cheap compared to most currencies in the world. Maybe it can be a great deal for americans and british people with their dollars and pound sterlings, but for the rest of the world it won't make difference anyway, as Euro will still be stronger than their local currencies. I believe the worst western european economy is, it never compares to how bad the situation is at Latin American, Africa, Eastern Europe and Asia.
In addition to what you said, I don't think the euro is going to lose its strength. I don't think Europe is going to become a popular destination again, especially for vacations. A lot of people have been choosing the east for vacations for years. That is, countries with a weaker currency than their own. How can such a situation change?
It takes a long time for things to change in the world. One of them is the Euro and I don't think there will be any depreciation as has been said recently. The European economy doesn't allow that. Or rather, even if it does, there is no economic structure to affect it.