If I look at things from a simplistic view......our weakest spots on the field in my view are CB, LB, LW. Forget about subs...this is the first team. I expect CB and LW to be addressed but not Left Back. My biggest concern is that CB (Alex) currently not in good form it would seem....and LW? The guys mentioned have their issues. Bottom line unless you spend over EU20m you aint getting a great left wing - such is the scarcity in the market today for good names. Afellay has injury risks, Vargas not exactly world class, Perotti unproven, Bastos no longer an option if we get Alex anyway (both Brazilians), Elia all pace running and no end product etc.
For Juve to be truly competitive for top 3 we have to hope that the left winger we get is a gamble that pays off and that we resolve our center back problem.