Valencia, 4-3-3, the defense and the squad

So we lost 2-0 away to Valencia in our final pre season game, the result matters little, and there were some definite positives as well as negatives to take from the game. Our first half side looked solid enough, while the second half eleven did not look as handy, the most interesting thing we've seen in the pre season has been Arsene's deployment of the 4-3-3 formation.I am in two minds over