I would like a 300 page hardback with nothing but weapons.
I would like to see disposable modules on newsprint or like a magazine. It would make it feel ok to write all over them and use them how you like. It is most likely not a good business model though.
I would like a book of nothing but numbers, please.::looks at post::
::looks at username::
You would, wouldn't you.
I have it in my mind that they wanted to keep things simple for the buyer - walk into store, get core books + one campaign book, leave

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.