Why don't we have an intermediate passing game?

I see teams lining up in similar formations to ours quite frequently. Tonight the Patriots have lined up several times with an H-back or an offset TE. They've ran slants, drags, and posts from several positions in this set. Why can't we do this? Petrino seems to wear it out with these simple passing patterns.

I don't want this to be a flame thread, but I feel like Gus used to run these types of things yet they've disappeared for whatever reason. Though I'm not sure why, as these are simple and effective routes to help the QB, no matter if he's a statue or a DT playmaker. I seriously just do not understand. I'm aware that this is an impossible question to answer without Gus' direct input, but I guess I'm just asking for the hypothetical reasoning behind his thought process in your opinion.