Provide a Section for Missing Content on Class Pages

Currently a lot of class pages are littered with comments from people asking where certain sub-classes are, because they haven't unlocked them, it makes the comments sections a bit useless for any real discussion of a class.

I'd like to propose first that class pages should have a "marketplace" section at the end listing sub-classes that are available but which haven't been unlocked, with quick options to unlock just that class, or to go to the book they belong to to see full purchase options. This should mean that anyone looking for a sub-class should at least be able to see it on the page regardless of whether they've unlocked it or not.

As an aside, I'd also like to ask that site developers consider whether the class page comments in their current form are as useful as they could be; something like a question/answer section might be better, such as you get on some online marketplaces to ask about products, i.e- a user posts a specific short question and anyone can answer it.