The UK has nothing to do with reforms concerning the EURO. That's up to France and Germany and the EU Central Bank.
The biggest problem is this. The UK is now leaving and taking a pretty big economy with it. Those payments the UK makes is going too.
The Germany Economy can't keep bailing out the poorer nations in the EU alone.
The market is now eyeing up all the banks in the EU countries and are sharpening their knives to do shortages.
I'm just waiting for 1 bank to need a bailout and then you'll see a long list.
Who is going to foot this bill, France, Germany, Finland? What conditions are they going to impose.
Is Italy or another country (Spain?) going to see Greece style sanctions?
Once this happens, I think you'll start to see other exit musings in other countries and it'll be the beginning of the end!