When looking at questions and you put your mouse over a tag, you get the following result:
But when I am editing a question, sometimes I suspect there is an unnecessary tag (such as the one in the image), but in edit mode, the tag profile doesn't pop up.
It would be helpful if that tag information pops up on the mouse hover.
If I get a popup that shows 1,000 followers, then I know I can probably leave the tag as is. Right now, I had to open the question again in a second tab (using Chrome) just to double-check the tag information.