Other European countries should appreciate that they might not be "the 5th biggest economy in the world" before they think about independence. Independence means paying your own bills and no safety net.
@Sandy
Among the flurry of threads was mention that migrants already here are suddenly being made to feel unwelcome and that UK is hostile to foreigners. There may be a hiatus while they think twice about coming and then a rush, to beat whatever deadline there may be.
That said, I feel that migration has a natural speed which just cannot be rushed. The person has to feel comfortable in their level understanding of English and also spent however many months of planning and preparing (and paperwork) it takes to get ready to conduct the legal migration process.
"No entry without a job to go to" is not in force yet, if I understand correctly. If that was part of Cameron's renegotiation, who knows whether that falls into abeyance, now that we're leaving?