Offensively, I would like to see Kentucky run the spread-option (much like you see out of Oregon). UK would have to get a dual-threat QB with the ability to make pre-snap reads, but it opens up the offense in a number of ways. Fun little playbook, a lot of answers against opposing defenses (which is why Oregon's offense works). Inside zone-reads, outside zone-reads, straddled triple-option, etc.
You don't need a Prescott. You don't need a guy that can make insane throws and break 3 tackles on half of his runs. You need a quick QB with an honest arm, and the ability to read defenses before the snap, and make the right call in the read-option post-snap.
Defensively, I want Kentucky to go to a 5-3. I'm confident in the back end of our defense against the pass with Westry, Baity, and Mike Edwards. I think Marcus McWilson/Darius West would be better suited as an outside linebacker in this formation. They have that kind of physicality, and with Mike Edwards, you're not giving up any physicality on the back end against the run or short pass. He's also competent at defending in man-defense, so that's a huge bonus.
It would give Kentucky a way to generate a much stronger pass rush (with Elam taking up multiple blockers at the nose tackle spot, 2 defensive tackles next to him (Miggins and Meant), and 2 defensive ends (Jason Hatcher and Kengera Daniel perhaps [unless we get a JUCO speed rusher]) at the defensive end spots.
You could generate a solid pass rush, and have Denzil Ware, Courtney Love, and Jordan Jones (maybe Josh Allen) if you're against a run oriented team (and as I mentioned, McWilson and West against pass oriented teams) behind them for the occasional blitz, and the ability to contain the run much better than we can in a 3-4.
A couple of years ago, or even in the 2014 season, this wouldn't have been possible, because Tiller and Quinn just weren't capable man coverage cornerbacks. Westry and Baity both have the speed, quickness, and length to be terrific CB's. Both are good already (Westry could potentially be All-Freshman SEC this season, will likely be All-SEC in the next couple of years). When you have a young defensive backfield like we have, that performs as well as ours has, it opens up new options. The only thing missing to make our pass defense that much better is a pass rush, and the way to have a good pass rush without opening up a ton of holes on the ground like we did this season, the way I see it, is in a 5-3 defense.
All things considered though, despite the fact that Chris Westry, Derrick Baity, and Mike Edwards were all true freshmen and started (some longer than others, obviously), despite the fact that Kentucky didn't have a pass rush, and despite the fact that our style of defense left Kentucky prone to lapses in gap integrity, thus, opening big gaps to run through, so our guys in the defensive backfield had that to worry about as well. I feel like a 5-3 defense could shore up those issues. Maybe I'm wrong somewhere along the line, but I think it's a solid idea.