Two of the SE edits during the Death Star chase actually contradict the original plot.

The stormtroopers leading Han and Chewie into the barracks and “Close the blast doors”. Since they’re only pretending to try and kill them, and are actually allowing them to escape, it’s odd to lead them to a barrack since Han will then wonder why more troopers didn’t pursue them. And if the plan to close the blast doors on them worked, what are they gonna do then? It’s gonna be really awkward to make them think they escaped because of their own skills when you literally have them trapped.

And yes, I’m sure that plan was devised by that point. As indicated by Vader’s line, “[The princess] may yet be of use to us.” That’s why they didn’t terminate her immediately.