I completely agree with you. My read is that the polls caused complacency on the part of the stay crowd. I think now that the Torries are paying lip service to Brexit, but are slowboating the process until they can get another referendum or, as we see here, a vote in Parliament that allows the party in power to say, "Oh dear! Those lefties tied our hands. We cannot leave."
The referendum was not binding after all. It was a sop to the right that backfired. The Brexiters are a needed if despised constituency by the Conservative Establishment (as is our far right here in the US) but the Conservatives dare not alienate them. Let us remember that Parliament is 70% against an exit anyway.
Let me go on record by saying that Brexit will not happen. There will be smoke and more smoke signaling Brexit. Smoke, but no fire, just a smoke machine. The EU has made it clear it will not give the UK a soft landing. And why should it? An easy out for the UK would only embolden other restive members. The conservatives will lose every young person in the country forever if they let Brexit go through. And let us not forget Scotland.
But they won't let it happen. How can the UK leave the Common Market that has fed prosperity (on and off) since the end of WWII? Cannot and won't. Wait and see.