Re: @anon: This is what it looks like outside the EU.
I have to agree more with Walter Bishop on this one. The EU could simply say that they won't renew .eu domains for UK residents once Brexit happens. They could say that they appreciate that the people who have .eu domains are current EU citizens and put measures in place to grandfather these domains as a token of goodwill to people who are probably backers of the EU.
But instead they are saying they will rather aggressively and proactively shut down these domains once Britain leaves the EU (assuming that things go as currently expected). That seems pretty petulant and zero-sum to me.