There is no good deal to be had plain the simple if you compare it to being within the EU, but I'd argue the UK was not working for a majority of the people that live in it. The EU did not play a major hand it it. If everything turns to shit I'd hope mass protest and direct action will force changes.

1: The people in power will find it harder to blame someone else for everything from bent bananas to the mass importation of cheap labour.

2: A more fair immigration system. Everyone will full under one system with an ability to set limits on total numbers and change requirements based on need. A Polish person will have no more right to live and work in the UK then a Thai or Mexican person.

3: Removing an obstacle to further EU integration. I'd argue that for the EU to work long term further integration is needed. Having a single currency without other central controls alone breeds a lot of issues when bailing out or propping up poorer parts of the EU. A stable EU is a good thing for everyone.