[jandrese]

It seems to me that the Brexit is going to hurt mostly because the EU is going to want to make it hurt to discourage more members from leaving.

That said, GB was never on the Euro so their transition is a lot less traumatic than it would be for most EU members.

The Euro has always had some dubious aspects, like tying everybody to the same currency but letting them set their monetary policy on a per-country basis. Problems like the Greek crisis are almost inevitable in a setup like this.