I'm all for details and yes, the reserve!Maya needs a reserve!Riley. Why? Because they already have a reserve!Lucas and (apparently) Felix could pass for reserve!Farkle XD. Go figure. Stevie would have been around during Nora's crush on Freddy's best friend, Mateo. That crush is why she dated Stevie's big brother the summer after high school.
Other than that, I'm all for the two of them being close friends. It could be total fun. Plus, she likes baking. Nora will marry her just to keep herself in cookies and cupcakes. Just saying.