I think the only way this transfer period can be considered a success is if it sees a top notch CB come to the team.
Someone like Carvalho, Barzagli, Cannavaro, maybe even Luisao. Guys like Ivanovic & Lugano would be silver medals.
Bonus points for grabbing a top LWM or midfield cover. If Riquelme is only £3m, that would be a smart gamble.