Posting another request for the return of the +/- buttons.
They're extremely convenient, especially for longer tags. New users who don't know what the buttons do are even less likely to know they even can add or remove terms from their searches manually. Clicking on one of the +/- buttons and seeing what it does is probably the quickest way someone's going to learn how to refine their search without expressly asking.
I know there's currently a workaround of sorts with Tapermonkey, but I think they really should remain part of the default experience instead of something users have to seek out and prep on every device they'd want to use the site on.