The only reason I wanted Cazorla sold is because I, and everyone else, know that Wenger will keep giving him an important role in this team when he should really be a bit part player. First guy off the bench and back up in a few positions.
Cazorla is a classy player, but he really isn't a central mid, and he isn't good enough anymore to be a starter on a flank. Hence, Wenger makes concessions elsewhere to compensate. Ramsey helps make it work, and Alexis doing a lot more defensively than he should sort of completes the Frankenstein. We play some sort of hybrid between a 4-2-3-1 and 4-4-2 diamond as it is today, and IMO it is mostly down to compensate for Cazorla. Even a Schneiderlin level player would allow us to play a proper 4-4-2 diamond, like this:
----------------------Coquelin
----------Ramsey-------------Schneiderlin
----------------------Özil
----------Walcott------------Alexis
Now, that doesn't work. Why? Because Santi is obviously not dynamic enough to be the primary player to help Monreal. Instead, we have to play Alexis a whole lot deeper to compensate. Now, Cazorla has other qualities of course which are valuable to any team, but his shortcomings ARE a problem. On the right side we pretty much play like a proper 4-4-2 diamond, but only when Ramsey is playing. He is dynamic enough to both act as a central mid AND be the primary support defensively for the FB. Chambo or Campbell just can't hack it. Wilshere can, but he is a perma crock unfortunately.
Schneiderlin is of course not the only player who would have been suitable, but he was available last summer. To be satisfied with the way things were/are is moronic on Wenger's part. He didn't like Schneiderlin? Then get another player more to your liking in ffs!