The more it’s discussed (not on here, but amongst our esteemed leadership) the more likely it is to happen. In today’s Times (pro Brexit at the time of the referendum I think, or was that The Sunday Times...one of them was) puts the chances of a referendum at 50%, and an election at 20%. Either will be too late to influence the negotiations, so in an odd way I’m with you. There is no point having an referendum including the Chequers Deal, because that has not been, and won’t be, agreed with the EU.
If they did have a referendum on the lines suggested my first choice would be in, and second properly out. The Chequers Deal is a horrible **** up of an idea, unworkable and the worst of all worlds. The true options are stay in, Norway style deal (ie Single Market), or out (meaning out of ALL EU institutions) followed by negotiation of a Canada/Japan type trade deal.