We don't need him and I guarantee you Rafael will be 1st choice next season, hardly makes sense to offer a player a new contract if he is not in your plans, and even if he is a squad player I would imagine that this deal has boosted his wages which if Sir Alex now valued him less than he had beforehand then surely he would not give such a bonus. Then again perhaps he would but I'm still relatively certain we will not be getting a new 1st choice rb, if we were to sign someone like Clyne to increase squad depth then that's a possibilty but I believe that the DaSilvas are still thought of as our future 1st choice full backs (current in the case of Rafa) by Sir Alex.
That is why I believe he was after an experienced full back in the form of Leighton Baines rather than someone young such as Willems. He simply wants someone to fill in in the year or 2 it may take Fabio to find his feet, why do you think the no. 2 has been kept vacant? So the DaSilvas can take the nos 2 and 3 (after Evra leaves). Debuchy is a very good rb but unless we were to sign him to play the left back slot then he will not be coming here.
On the subject of full backs, since Baines is being completely overpriced by Everton, who do you think we should get, btw I am not talking about potential like Willems, I'm talking about already fulfilled ability, Aly Cissokho is probably the youngest player of such ability though he may grow annoyed in the future that Fabio will be preferred to him so really I think an experienced full back of the age of 26 or more is who we should be looking at, options are pretty limitted in that age group unfortunately, any suggestions?