The whole argument about whether we should have a second referendum hinges on one simple fact.
If you voted remain you knew exactly what you were voting for
Nope. Remain was framed as "voting for things to stay the same". But that's not what remaining in the EU means. If you remain in the EU you follow the future direction of the EU. At the bare minimum people should have been told what the EU's plans for the future were.
whereas, as has been proven by the chaos in trying to define how we Leave, people voting for Leave had no idea what they were voting for.
Nope. People who voted leave chose to take back control of laws, borders, and money.
People arguing for remain seem to focus on the economic arguments, but fail to understand what sovereignty is or why it matters.
Leave voters understand there are economic consequences, but are prepared to accept them, because leaving political control of the EU is vital to the future of the UK as a sovereign nation.
I doubt there are many Remain voters who have changed their mind since, there are plenty of Leave voters who, now they've realised it's not quite as simple as was made out, and we're not actually that powerful that the EU will roll over for us, will have changed their mind.
There probably are more leave voters who would switch to remain than the other way around - because the TV has been full of scare stories about how the people got it wrong. That's a tactic by those with vested interests to prepare voters to vote remain in a 2nd referendum.
I am a Remain voter who would switch to vote Leave. Whilst I was always pro-Brexit, I thought leaving via an advisory referendum was weak so that's why I voted Remain - with the intention to vote for a Leave-supporting party in a general election, which would have a better chance of success. As it happens we had a general election anyway, but I couldn't have foreseen that.
"not quite as simple as was made out" - I think this is condescending, the Leave position is more nuanced than Remain, I think those who argue Remain haven't really understood the Leave position fully. It's not the leavers who haven't understood their own position, it's the remainers who haven't understood it. I've lost count of how many times I've heard "why would you vote for something that would make you financially worse off, I don't get it".
The question of whether the UK can actually leave the EU - both legally and practically - is vital to this whole thing. If the UK is not able to leave, that's a sign that no member state can leave, which means all member states have given up their "sovereign nation" status. If the UK does not leave, a consequence should be riots in all EU member states demanding the immediate dissolution of the EU.