I'm afraid minds are now closed. Brexit mean Brexit and that's what we seem about to get. It was confused 3-4 years ago and it's no clearer now.
Unfortunately we don't seem to be able to have a clear view to compare what we can have now (after Cameron's amendments) with what we will get. That's not possible because we're going into a fog of uncertainty that is going to last 2 or 3 years at least. In another referendum Remain may be able to provide a clear view of the present position (but they failed to sell the EU 3 years ago) and the Brexit side may be able to paint another picture, but it can't be detailed, more hopes based on assumptions. That abstract view has served them well up to now.
The result is any new vote would be highly influenced by "let's get it over with" elements, whether they originally wanted to stay or go.
The irony of all this is that we have an opposition that's opposing itself! Corbyn sits for a strongly remain constituency but has a history of wanting to leave. His party members and MPs mostly want to remain, but his traditional voters mostly want to leave. During the early Thatcher years she was facing Michael Foot who was a similarly sincere man who was seen as unelectable in 1983. I see Boris coming through this stronger, as did Maggie after the Falklands - a campaign that should never have happened if the Foreign Office had spotted the warning signs. A bit like Cameron and Brexit but Boris looks like the one to benefit this time.
George Canning was the shortest serving PM back in 1827. A Tory, his health was broken and he died in office. The party was split just as now. 200 years later it's survived a few more schisms and is still going.