Arsenal gets plenty of stick for not having the right sort of players, but it could just be the formation that is the problem.
Since his time at Arsenal, Arsene Wenger has used three different formations with his various squads. First there was 4-4-2. Then, for a short period, 4-3-3 and now 4-2-3-1.
The players during the 4-4-2 era fit the formation well, and Arsenal had its most successful period under Wenger's tutelage. If you want to be specific, that formation was actually a 4-4-1-1 and could be seen as a more defensive version of the current 4-2-3-1 setup.
Arsene Wenger seems to want his side to go back to the quicker passing style of the "Invincibles" squad rather than the more possession-based side he tried to create when he first changed to 4-3-3.
So which formation suits this current squad the best? The formation should enable the squad to be quick on the counter but also enable them to dominate the midfield with possession and have a stable defensive setup.
One major problem is the club's lack of a true winger, like Antonio Valencia or Jesus Navas.
If the club could find a formation that gets the majority of the squad playing in their most natural positions while enabling them to play the Arsenal way, they may become more successful.
Lets take a look at a few options for the current squad. Feel free to add your own preferences for formations, lineup etc. in the comments.