I'm not sure if gas planning could've used more discussion, or if I just didn't pay attention enough to it at the time becuase I didn't necessarily see their importance. I was more worried with the whole getting under water and still be breathing part, along with bouyancy, remembering my safety stops, how to properly set up my equipment, what depth I can goto and how long I can stay there, mask clearing along with my other skills, as well as those other 1000 things that we all do naturally now, but when starting out with SCUBA, seemed like a huge task.
Really, I'm perfectly happy with what my OW class gave me. It gave me what I needed to know to dive safely. Once I had mastered that, the rest can be covered in other courses, like AOW. What I didn't take away from my AOW was my own fault for not asking, as my instructor was more than happy to elaborate on anything I wanted to know.