As I understand it, we only get full control of immigration if we leave the EEA as well, and, as of yet, no one seems to have explained whether, in the event of a 'Leave' vote, we will stay in the EEA or not. It is quite important - a bit like booking to go on holiday without any information about the type of accommodation. Of course, either way illegal immigration will carry on as before because no Government seems to have a clue as to how to stop it. No British government, anyway.
But from City's POV, (assuming we quit the EEA) any footballer from outside the UK and Ireland would need some sort of work permit. And, if we are to believe what BJ is saying, these would be allocated on a points system. But what we can't know yet is how that points system would work, and whether it would be helpful or not.
Sorry, but way too much uncertainty for my liking. We should have a clearly set-out plan for what happens after we leave the EU. No such plan seems to exist, and people are just making stuff up and spending the anticipated 'saving' over and over again. I had hoped that one genuine saving might be to abolish the ludicrous subsidies to uber-rich farmers like the Queen and the Duke of Westminster. But on Countryfile BJ was clear that the farming subsidies will continue!