At the risk of incurring the wrath of the Casey folks (I'm a CC supporter, as well), I have to ask the following. Is his arm strong enough, enough of a threat, to keep defenses honest? We all saw that he is decisive, "reads" well, is quick and accurate.
We also know what he can't do; run. The defenses he played against flat out ignored his "threat" on the read/option. But a lot of very good QB's can't run a lick.
There are now three games on film. If Defensive Coordinators deduce that arm strength is an issue, they're going to take away quick stuff and bubble screens that CC has, so far, excelled at throwing. Unless CC shows he can "air it out," things are going to get crowded, in close.
I think after watching Cochran on film, and working on defending the pass, the first thing a defensive coach is going to want to do, is see how Cochran reacts to getting hit really hard a few times, and they would find ways they think they could get some hits on him, look out Casey - if you throw an INT.
After that, you focus on taking away what the passing offense does best. You can't defend the 3 and 5 step route trees that Cochran does well, all over the field though, somebody will be open if the QB can make the right read, deliver the ball, without being disrupted by the pass rush. Offense always has advantage over defense in the game. Naturally.
The thing that will keep Cochran successful as a QB, is being very deliberate about dispersing the ball all over the field to multiple receivers. We've had this kind of QB in the past before at UCONN, on more than one occasion. Not overly physically gifted, but given enough time, able to make use of multiple options that he throws to.
If - IF IF IF, Cochran ends up the starter in the fall, I think he's probably schooled enough, and smart enough to know it too. It would get real easy for a QB in the UCONN offense to focus on a guy like Geremy Davis as a primary threat, but good defenses take away what you do well, and the way Cochran stays successful, is by keeping the ball going to multiple receivers all over the field, and making the choice of what receiver to take away by the defense, very hard to make. take away DAvis on the slant / go? That's fine, we'll go to the other side of the field to Foxx. Take away the middle of the field on the crossing routes? Fine - we go to Davis outside.....etc. etc...