The reason teams play out from the back thought is because of the high press, to beat the high press. Your supposed to play out from the back draw the press in then either put a ball in over the top to a runner or quick intricate passes round the opposition to break the lines.
Unfortunately for us we have idiots playing for us so we either draw the press then pickford puts it out for a throw in or passes it straight to the opposition. Then we have players like Keane, Coleman, gomes, sigurdsson, davies and mina who ether can't pass or won't pass it forward meaning we just pass it round the back till the press is too much and we pass it back to pickford. Used the right way playing out from the back is a very good way of playing but with the dross we have it doesn't look very good.
Anchelotti is concentrating on implementing a style of play for the future and those players I just mentioned won't be the players here to play it in the future but the team on the whole will benefit from us playing it now.