Personally I would have voted for Brexit if I were living in the UK at the time. I am against this centralized Government thing and following Brexit we can see how those people who control the Brits behave.
Many of the points you bring up might happen but then it works both ways, so if the EU wants to get tough with the UK then probably the UK will do the same back at the EU. This is what the negotiations will all be about.
Nevertheless, because of the close relationship between the UK and the EU, I think that controls on visas, employment and studies will reach a compromise that benefits both sides. At least, this would be smart and I am sure it is what the Brits would like. The problem as I see it is that those who run the EU seem to be out for blood and to take revenge on the UK. If this was to happen then they could spoil things for everyone.
I have friends in the UK running local government. As far as they are concerned everyone in the UK has gone mad. Property prices will drop (not a bad thing for all), the price of holidays overseas will become much more expensive, and job security is a worry. Pensioners may get less than they expected, and already many of them must continue to work well beyond their retirement age to make ends meet.
Currently it has become very difficult for non Europeans to move to the UK to live and work. But perhaps in the future things will change and if the UK adopts the point system for immigration then that would allow people from other parts of the world to come to the UK to live and work. I do not see that as a bad thing.
But probably, like most people think, the rules about free movement within the EU was one of the deciding factors that made people vote for Brexit. That and having to hand over £349 million to the EU every week (now recalculated at £199 million I believe). Oh, and having people in Bruxelles like Jean Claude Juncker telling the Brits what they can and cannot do.
So I feel positive about the UK's future although it will take time. I believe that without the controls of the EU that the UK will thrive again in the future and perhaps do even better than before. I believe that in the future the UK will have more respect in the world, and continue to be a magnet for investment and for the wealthy. And I believe that many of the regulations that currently exist as part of the EU could loosely be continued but that it would very much depend on how tough the EU leaders want to be on the UK in the Brexit negotiations.
There are so many issues that could be discussed including border security. I feel the UK would like to be flexible, but we'll only really have an idea about all of this once the Brexit negotiations begin.