Will the EU ever change its position on Brexit?

I don't know how many times I have read or heard that the EU Brexit negotiators are never never never going to change their mind and rewrite the deal they signed with Theresa May. But here was Michel Barnier, the chief negotiator once again saying just that. Non, he said, there would be no change. Yet the British prime minister and her Brexit team keep on going back for more punishment, and Theresa keeps on telling the House of Commons that she will have a new revised deal to present to them sometime in the next few weeks. Where is this revised deal going to come from? Certainly not from Monsieur Barnier. Certainly not from President Donald Tush (sorry Tusk), Polish head of the European Council, and certainly not from President Jean-Claude Juncker, Luxembourgian leader of the European Commission. The EU really does have too many presidents. Two too many. Whatever happens back in UK, for the EU presumably it won't make any difference. So Jeremy Corbyn, would-be next prime minister, has come up with his five-point plan which includes staying in the EU customs union and single market, and Boris Johnson, once a would-be prime minister but with about as much chance as Corbyn to make it, has suddenly softened and said he would accept May's Brexit deal provided there is a limited timespan for the dreaded Northern Ireland backstop. Well the EU chaps won't accept any limits to the backstop because they don't want even the minutest of chances of having a hard border between north and south in Ireland. It's their insurance policy and they're going to hang on to it until/unless there is a guaranteed trade relationship with the UK that includes a smooth no-border arrangement with Northern Ireland. And the EU negotiators are hardly going to grab a Corbyn proposal because it would entail doing a lot of rewriting. And they have said they WILL NOT CHANGE THEIR POSITION. It's all going nowhere. But here in good old Blighty, fantasy politics is carrying on regardless.