I completely agree with this opinion. The leveling experience should be the way it is now and since Shadow Lands already has the experience streamlined, the current buff would be a nice thing to have going forward. If we can’t have it, that’s fine but there’s nothing wrong with hoping for it to extend 
btw there’s a pretty huge thread on this already, creating a duplicate isn’t optimal.
https://us.forums.blizzard.com/en/wow/t/news-gain-the-winds-of-wisdom-100-experience-buff/