I knew you had an obsession with the UE. Yes, we get it, the UE is not the most transparent entity. But if you want out, you have to make sure you know where are you going. With the US disapproval and the UE's bitterness, the UK is not playing with the big boys anymore. The world is a connected place and your strength is measured in the number of top connections you have.
The idea that most of our laws come from the Eu is often stated. But those stating it either are ignorant of or chose to ignore that all laws are not equal. Primary legislation on education or crime is far more important than changes to say a dozen Eu directives about food additives or livestock transportation. Lumping them all together is just dishonest.
If you count every single gentleman's agreement, informal accord, mutual understanding and non-binding guidance, yes, 80% of UK law is brought about via the EU. But actual, enforcing law is considerably less, hence the House of Commons figures.
While it is probably true that the European Union makes a majority of our laws, to suggest this is important is misleading. The important aspect is what laws they are making, not how many. Unsurprisingly, the single market requires significant regulation. If you take each law as equally important, the Single European Act was the single largest transfer of powers this country has ever seen. Yet most would agree it was important. It is about what laws are made, not how many.
As I said to OP once before, 1%, 100%, it doesn't matter how much of our law is made by the EU - if it ends up enriching the country further, I am prepared to accept it.