But… that’s the point of the End Turn button. You should only press it if you are sure of your play. Final decision.
They could maybe add an option to do a double check. Like, you press End Turn and you’ve got a 5 seconds countdown that you can pause to improve your play and restar once you think you’re really done with your play. Once the countdown reaches 0, your play is locked.
But I think this should be an option that you would have to toggle on in the Setup menu, because the game works perfectly with just an End turn button that locks you in. Sometimes you will see a better play you could’ve done, but that’s precisely the challenge of the game: find the best decision, faster.