I see no reason why RSC was left out of the squad in favour of Ade, tbh. If he can regain anything close to the form he showed at Blackburn then he's exactly what you need [in the system Mancini played tonight].
But, imo, you need a left winger; funny that two left during the summer. Both would've thrived in the system played tonight. Tevez needs to be played through the centre, swapping with a LW at will, not playing mostly from the left. Toure looked good, though. And Johnson had a decent game.