what this proves is you can get people to do anything if you attach it some vague immigration reform agenda to it
there will be no impact on immigration but don't let that affect the celebrations as the money drains out of the UK

Agreed, people will have an unpleasent surprise after their adrenalin dump.
But, the EU is the worst idea ever. It's basically supranational debt union. If you think there's any benefits staying in eu, please, do tell.