I think there are but a few people who would say that the outlook for Britain's position in the world got better from Brexit.
In the 21st century, if you're a small country like Britain you have to latch onto either the US, the EU or China or Russia. Those are the powers you can bandwagon along with. Right now the UK has two of those four as close friends: the EU and the US. I think that the US and UK are still going to be close friends, no matter who is in power in the White House or Downing Street. But any sort of weakening of ties between the UK and the EU is likely to be bad for Britain's standing in the world.
https://www.youtube.com/embed/3eoQ9HsQeqE?wmode=opaque
It's also questionable whether or not the trade ties can be resolved. If the single market is taken off the table, every economist agrees it would be bad for the UK. And this is the rub: how do you deliver on the mandate which a lot of people voted on, based on immigration? I cannot imagine a world in which Angela Merkel is able to sell the idea of a points-based system for any EU citizen wanting to come to the UK, but where British workers will be able to work wherever they like in the EU. Its never going to happen.
"In order to participate in a single market you have to sell products that abide by EU rules. And that's not what the Brexiteers voted for."
Or rather its not going to happen unless a soft Brexit occurs, where the only changes would be to take away the UK's voting power but still to allow it to be part of a single market also to allow them to have a say in immigration. That would be a problem: it would mean accepting regulation without representation with no real change to the stuff that people were upset about in the first place. So the 'Take back Britain' idea is one that basically hinges on economic downturn. In order to participate in a single market you have to sell products that abide by EU rules. And that's not what the Brexiteers voted for.