There is a lot of passive aggression between UK and UL fans on this thread. In the end, I believe most UL fans when they say they'd sacrifice a few recruits to get brohm.
They believe, rightly or wrongly, that Brohm is a coaching superstar that will truly shine when he gets home.
His coaching track record is mixed. On one hand, his W-L record isn't great, he routinely loses games that he shouldn't (e.g. had a losing streak to Minnesota before this year, lost to Syracuse this year, etc), and he has never really had very good defenses at any of his stops (which is one reason why he has never won titles or come super close to it at any stop). Also, he has never been a recruiting juggernaut, so I don't believe him being at UL will change that.
On the other hand, his teams just seem well coached. I have routinely seen average looking quarterbacks over perform their skill set under him. He routinely comes up with at least one game his team "shouldn't win" every year and wins it (he beat Ohio State, he beat Tennessee, he beat Michigan State, etc) (perhaps this "cancels out" his gag game every year). He also is a presence in Louisville, so maybe this will "put him over the top". Also, I would argue that he will have an easier time winning in a sad ACC than he did in the big 10.
So, the proof will be in the pudding. My opinion is that he will do well at UL. He won't win national titles, he won't win acc titles, but he will field a good team every year that will finish anywhere between 6-6 and 9-3. The rivalry game will be harder to win for UK than it has been, but I see no reason why we shouldn't continue winning a lot of them as we have almost every conceivable advantage over UL.