[Lazamataz]

Trump dodged a bullet: if Cruz endorsed, there would be some obligation, and Cruz would still be a back stabber. He’s clearly out in the open now.

To your point directly: It still would have been preferable to have Cruz endorse.

1) The Propaganda Ministry would not have this 'backstabber' point to endlessly report on (rather than some positive message that emerged from the convention)

2) It might have brought a few diehard Cruzbots back over to the Trump camp.

3) And finally, Trump could keep 'delaying' delivery on any unstated and unnegotiated obligation. "Sorry, Ted, this person is just a little more qualified for the SCOTUS nomination. Maybe next time!"

[LS]

1) maybe
2) never
3) yes