@thegcatsmother I said RESPECTIVELY ie the point about defensive referred to NATO and the Russia/ China vetoes to UNSC.
We had a lot more influence inside the EU than we will outside it, that's a given. We had our opt-out from the Euro, from ever closer union, we got passporting that massively benefited OUR financial services. We were prime architects of the single market. I think you are the one kidding yourself.
The US and Nafta is a poor analogy with the U.K. and EU because the US is massively stronger than its (two) trading partners. The GDP of Mexico is 10 times smaller than US. So of course it can't demand the concessions of the US that EU can from us. It needs the US more than they need it - a familiar Brexiteer argument which was essentially bollocks. We are the Mexico here 
Theresa May's choice was accept the EU's sequencing or ... no negotiations. I'm not sure how you think she could have got the EU to back down.
I don't think you've really refuted my point that ever closer union is an unshakeable destiny for all EU members - and anyway we didn't need to leave now 'just in case' ...
Regarding moving, in the country I am in, until 31 December a British person could move here at will, stay in practice as long as they liked (Brits living here for 10+ years without registering) and if they found a job on day 2, then they could get registered and start work within weeks. Post 1 Jan, they can stay a max of 90 days in 180 unless they apply for full time fiscal residency. They will need a visa, employer sponsorship or around 20k euros per year in income. In other words, freedom of movement (of labour if you want to be pedantic, although as I said plenty of Brits lived here without working) will be massively curtailed. I'm not sure how this is any kind of benefit but perhaps you can enlighten me. There appear to be a lot of very pissed off Brits here.
Dynamic alignment is only another way of saying non-regression on standards. Because you can't have a situation where the EU makes a ruling in EU that means U.K. companies are more competitive within the single market. And some supranational body's got to oversee it. IF there's a deal, I suspect there will be some compromise on how impacts on competition are assessed and on independent panels before ECJ - but the EU aren't going to concede the non-regression principle and why should they?
On 1 January the UK's long slow slide into irrelevance is going to hit turbo. Followed quite possibly by its disintegration if Scotland gets another referendum. I'm very lucky to be out of it.