Let's do a CT risk benefit.
The main risks are 16% loss of GDP, devastating the NE economy and the prospects of a generation, loss of inward investment, including Nissan, and countless other ones from collapse of NHS to the troubles reigniting in Ireland.
These are CT's stated benefits:
1) Access to single market for trade and services
This isn't a benefit, we already have the best access possible by being a member.
2) Control over immigration / borders
We can't have this without a border in NI and losing access mentioned in 1)
3)Free trade deals with rest of world
Never been explained how FTAs outside the EU will be better than in. Means we're out the CU, so hard border in Ireland, major non tariff barriers at Dover. As well as tariffs.
4)Sovereignty over our own laws / policies (eg Democratic accountability / vat on fuel)
We were always sovereign, as Brexit shows. There has to be supranational laws and courts to govern trade. WTO is an example.
5) Separation from an union that wants to expand further geographically and politically.
We had option for opting out ever closer union.
6) Separation from the unstable Eurozone and the problems we could get dragged into financially and due to free movement.
Not in Eurozone.
7) UK decision on TTIP
Ha ha. You're an idiot.
Yep, definitely worth it.