While we did have the idea before, I can't really say if it's necessary to have an extra tag for it. As it is now, people who want their writing awarded with a prize have that chance every two weeks with the Writing Challenge.
But the best reward writers can get is really that people read their stories and comment on them.
I wouldn't be against giving RA to really outstanding writers though, if that is wished for. I don't really see it as necessary though, and frankly, we have too many good writers that would somewhat deserve it.
You already have Librarian
Not really. Librarians are like Godmothers. You don't hand Godmother to the ones playing the games, do you?