Could we modify the pop-up of the downvote icon of questions?

Question

Reading the answers and comments that I got on this question "Could we add a delay before being able to downvote a question?"
I changed my mind:

• An answer needs to be upvoted or downvoted, it is fundamental

• For a question, well :

  1. if the question is not clear enough:
     - no body or few people up vote,
     - but please do not downvote, leave comments to guide the owner of the question to improve it

  2. if the question is or became clear and interesting:
     - people will upvote, and their vote will show the real value of the question (no polluted by the downvote behaviour described in Oli's answer).

  3. If a question is downvoted, rather than editing his question, the owner of the question may create a new question (perhaps with some improvements) to reset the value of his question

My conclusion is:

• downvoting a question because it is unclear leads to discourage new comer
  
• downvoting a question because it is unclear leads to make the owner of the question create duplicated questions
  
• downvoting a question because a similar question is already existing is a wrong behaviour, close or flag the question for duplicated question

So lets change the pop-up of the downvote icon:

Instead of:
<<This question does not show any research effort; it is unclear and not usefull>>

Replace by:
any proposal ?

Answer 1

It seems that:

• downvoting a question is not made to flag that the question is unclear
  => using a comment is better for that
  
  Let me explain why a comment is better than downvoting in this case:
  
  -With a comment you give guideline and educate the owner of the question.
  -Whereas after downvoting a question because it was unclear; the owner of the question improves it; but mots of the people who donwvoted will not come back to upvote.
  The evil part of this behavior is that people will not open a question with a negative rate thinking that it is a bad question. So the chances of the owner to see an answer to his problem is decreasing. (even if he improves his question) due to old downvotes.
  So he better create a duplicated question than editing his original question.
  

• downvoting a question is not made to flag that the question does not show any research effort
  By "research effort" I understand that some other question have already been raised and answered,
  => so using close or flag is better for that

So the only valid part in the pop-up is question is not usefull
But it makes no sense to say that downvoting a question is just to vote for usefull question, otherwise any user will downvote when he is not interested by a question !

---

I still wonder why it is needed to get such downvote option for a question

And after some reading about Downvoting a question:

• vote down privilege
• and asking a question is a privilege
  << We believe asking questions on our site is a privilege, not a right. If, after a few fair attempts, you haven’t been able to prove that your contributions to a particular Stack Exchange make it at least … not-worse … then we reserve the right to refuse your questions. If we don’t do our part to cull the bad questions, then we risk alienating the true experts who provide what really matters: the answers!>>

I finaly propose:

<< Downvote to mark that this question is polutting AskUbuntu and that the user should potentialy get restricted rigth to not raise question >>

Which is finally pretty rude, but it appear to be the real reason for downvoting a question. So I maintain my first though: downvoting a new comer too quickly is pretty rude.
But with such clear pop-up, some downvoter might not downvote so quickly.