I'm not sure what "another screen" means?
Right now, if I click on a tag, I instantly see all the notes that have that tag. If the tags are on another screen, does that mean I lose the view of the whole context (= all other notes)?
If the solution is to make them disappear from the current view, for me that would be a regression, not an improvement.

Tags are a big weak point (for me) in Joplin (no hierarchy), this solution to move them elsewhere would weaken them even more by putting them in the closet, while they are essential tools (to varying degrees depending on the person) in organizing notes.