Nice review as always! I'm also high on the same top 4. Aside from those I like both the Boros MDFCs quite a bit too; I hadn't considered Flamescroll guy up until now as I have no experience how good a Silence effect is in cube, but you made a good case for that being potentially useful. And Plargg/Augusta is a nice pick for two archetypes in one card which is neat, agreed there are fewer decks which would want both at once though. Might test both cards out!
On spoiled card wishlisting and 'should-have-had'-isms: