The Ask Question page need to give users more info/feedback when the 'Question you're asking appears subjective and is likely to be closed'' warning is shown.
I was shown this warning while asking this question and it is frustrating to not be given any advice on how to improve the style/wording.
I am a reasonably experienced StackOverflow user and am well aware of the whole subjective argument so it was easy enough for me to sort out.
But if an inexperienced user got this, they wouldn't have a clue what it meant or how they were supposed to fix it. All it really needs is a link to a relevant page (see link above maybe) explaining how to 'unsubjectify' your question.