He campaigned to remove the rights of Brussels to determine who could come to the UK and put it back with the UK government.
He campaigned for no such thing.... that only ever applied to EU citizens and we did not apply those rules effectively; as you well know.
Two of the core themes for Leave.EU and Vote Leave in the referendum were immigration and taking back control of our borders. They wanted to lower the overall number, not just EU, coming in (anyone and from anywhere) and also to choose their skill levels. They wanted total control - our way or the highway. That's what he campaigned for.
You cannot campaign for something that does not exist. Nothing was mentioned about a "reasonably liberal immigration system". It was not in any advert, press release or speech. Not on a bus. It did not exist - it was not thought of. Liberal immigration for all was the last thing they wanted - control was! Unless you have links saying otherwise.
However, now that some 1.4 million EU citizens have left Tim and his mates want to move the goalposts. Suddenly up springs this brand new and shiny 'reasonably liberal' (whatever that means) immigration system. It's not for everyone, mind. The world's people can queue because Timmy wants to prioritise those from the EU - he said so.
If it has been around since before the ref, as you claim, you will know it in great detail, won't you, and be able to explain it to the nth. Who these people are, Where they will come from, The skills they have that we lack and why we cannot fill them. How many we need. For how long. Or is it so 'liberal' that anyone and his dog can just turn up to fill any position no matter how unskilled, even pulling pints in 'Spoons?