this would certainly improve our starting XI, but overall? im not sure. Cuadrado and Sanchez would require all our money (including the money from Marchisio) but what then? we would use a 4-3-3 i suppose in which we would have only 3 CMs (4 if you count Asa but then we would have no LBs) for 3 positions and this season has shown how important Marchisio is when Pirlo/Vidal where injured and when some of the starting trio needed some rest. ofcourse, we could always sign a bunch of freebies to fill our bench with, but who?. the good ones are already taken or renewed their contracts. the only ones i can think of are Pizarro as CM and A. Cole as LB but how long till they too find a new club...
all im trying to say is, if we sell Marchisio and buy those two (which wont happen anyway) we would have: a new formation with great wingers

but also no bench CMs and possibly no LBs

i dont know if this would be good....