What if? Brexit reconsidered…
Brexit, if it happens, might be a useful exercise since it will show that the EU can expand and contract without disappearing. One of most terrifying perspectives is an uncontrolled break up amidst violent conflicts.
Brexit, if it happens, might be detrimental to the EU prospects since the EU project will acquire more and more centralizing and bureaucratic characteristics, which after some time would lead to the dramatic break up.