Our laws are currently fairly inline with EU laws. It's less work to fully align them now than in 10 years, when the Tories have fully dismantled workers/privacy/consumer/human rights.

And I have no issue with the Euro. We still get to do our own artwork on the notes/coins.
We clearly need immigration to cover the jobs people don't want to do, despite the fact that the "they took our jobs" group would whine about work they personally don't want to do being done by others.
It would simplify and clear up our trade, just-in-time logistics for all manor of things, and likely put the UK in a better position as an "English speaking HQ of Europe" for companies.

Ultimately tho, theres going to be a decade of shit to wade through before any potential benefits of Brexit actually come around.
This was a huge talking point about Scottish Independence ("yeh, but you'd be fucked" "oh sure, but after 5-10 years we would be in a better position"). It's fair to say the same applies to brexit (although the benefits of brexit are a lot less apparent to me)