What does it say about SEC DCs that only one thought about Manziel going left?

I mean shite, the Bengals just owned Manziel tonight, and claimed afterward that all they did was force him to his right. LSU did this two years running and made Manziel look mortal.

All it seems to have taken to contain Manziel was forcing him to go right, and yet of the DCs that got a crack at Manziel during his two years, only one figured this out?

I'm not even saying this to prop up my team here, because I think this kinda thing should be a baseline expectation for a defensive staff watching film on someone. I can forgive not figuring this out in 2012, but this wasn't some kind of sudden discovery late in 2013. The Bengals went to the film and located his weakness no problem.

To be fair the correct answer is probably "nothing, it's one isolated example among hundreds that SEC DCs see in their careers," or maybe "the NFL defensive staffs have more film and time to research than college staffs," but it's just mind-boggling to me that the Bengals can find that tendency so easily and only one DC can manage to exploit it worth a damn during Manziel's college career.

EDIT: I should probably clarify that Manziel is one of my top favorite non-LSU players; this isn't a "bash Manziel" thread by any means. I love his confidence and improvisational skills. It's just that this guy ripped the SEC a new one statistically for two years despite having a weakness that, as far as weaknesses go, isn't all that hard to scheme on. I don't see how that happens if SEC DCs are as good as we think.