To me EU looks like USSR.

I doubt Italy will exit it, because without it Italy is nothing. Britain is strong country, EU really pulls it down. Maybe now will be some harsh time for Britain, but in long term Britain will benefit from brexit.

I think every union either become a whole country or falls apart. EU consists of some economicaly strong countries who profit by destroying the economics of more weak members of the Union, meantime giving them loans and calling them dead beats. In turn, small countries acuse creditors but like their money. So it creats a sick cycle. The sick cycle breaks when money ends, like it was with USSR. So EU can last rather long term but in the end it will fall apart.