Kirk did have no precise plan either when he went after the Narada, his crew contributed ideas and then they had a plan.
If they would all have known what to do earlier, the plain execution would have been boring and there would have been no 'all seven together on the crew' scene.
And Kirk not having a plan is not really new, it's not like he got e.g. out of Rura Penthe because he had a plan. It's all about being true to the character.