True, but outside of our starters we've got nothing but trash at the wings. I think it's been made clear in the play-offs Doc isn't comfortable with Daniels as the first wing off the bench. His offense is lacking (he's a much worse shooter than Rondo), his defense has been overstated, and he's fragile. As for Wafer, he's not guaranteed to be any better than Daniels talent or durability wise. Fernandez' talent is more important important than the fit.
What is important in a backup wing is that he gains the confidence of Doc Rivers. We saw how Tony Allen lost the coach's confidence last season, then regained it. Marquis Daniels is obviously a player of some talent. It may be that another year is what it takes for Doc to fit someone into his system.
If the Celtics did acquire Rudy Fernandez, I think it is possible that he won't immediately win the love of Doc Rivers. He's a player who is reported to want to be a playmaker and doesn't try as hard as he could on defense. He is considered an ill fit for Portland's system and, when Brandon Roy had a hamstring injury mid-season, Fernandez was still coming off the bench, as Bayliss and Blake got starts beside Andre Miller. So, it is logical to worry that RF will sulk if he finds Doc Rivers being stingy with minutes because he has problems learning or executing defensive rotations.