There are a lot of ways that they can stop CE being practical in AVA. The most obvious being making all guns, rounds, and boxes server sided. I have no idea why they haven't, I mean, surely it doesn't induce lag or impact on the strain in servers at all.
A more complex patch would be to make the values completely roaming, so that cheat tables and previous, saved, searches would not function. Basically it assigns 10, or 20 random instances that occur when you open your client. The same thing is done in COD:MW3 in terms of the hosting system; there are 12, if I remember correctly, values that influence how a host it picked; thus making it extremely hard to find which value/s you want to alter.
However, no matter what, all guns should be server sided, IJJI is just stupid leaving guns on the client.