Alexis did well tonight considering he's not used to playing on his own. With time, Ozil behind, and the OX and Walcott on the wings, it's a pacey, deadly attack. The only snag is if Alexis, the OX or Walcott pick up an injury we're playing Campbell, Gnabry, Cazorla, Rosicky, et cetera on the wings.
Squad depth, Arsene. Last season proved how limited we were when key players picked up injuries. Compare that to City, Chelsea, and even Liverpool this season and it only goes to show how much further we've fallen behind. Wenger's no idiot, though - he's well aware of the problem, but his stubbornness to take risks/splash the cash and sign players like Higuain, Balotelli, et cetera needs to be addressed, otherwise Sanogo will be leading the line when we endure another injury crisis shortly before/during/after Christmas.