I do not think things would be as straight forward as this next article states. However, with all the hardships that will ensue after the UK leaves the EU; I do think it would be better for us to leave rather then try for a renegotiated relationship with the EU.
We must be completely in or completely out. To be completely in a very undemocratically led EU, as it is at the moment, is no longer a viable option.
In the long run, the EU will become democratically viable to its citizens, but alas, not quick enough for the UK. Our politicians can't sell the EU to the electorate as it is. The EU has dropped the ball and no longer cares about UK membership to the degree of becoming democratically responsible to European voters quick enough. The EU is far too interested in saving the EU currency.
Rome burns while un-elected Presidents play their fiddles.