They do, but I still remember when Khan first came out and everybody wanted to see its Total Breakdown as a separate product. Well, I can neither confirm nor deny it now is a module. 
Nor can I confirm or deny anything about New Beginnings. Only Blue Skies has been confirmed.
Another thing that came up with Khan was the way the healing worked. Saint compared Total Breakdown, Regen and Rebirth to three entirely different approaches to the same thing. We didn’t know then if they should be put together, I don’t know now either.
Plus, I don’t know if you should create a sub that does all at the same time. You could be telling your subconscious to go left and right simultaneously. Eventually you’ll want to explore both sides, but should you do it together?
Finally, don’t forget about modules that make you happy, grateful and things like that, as well as modules that work to enhance the effectiveness and/or stackability of the sub.
I’d be surprised to see people that end up under the max amount of modules on their first go. Sacrifices must be made…
This makes me reconsider the answer I gave Hermit. In a way, you can create support subs, yes. Or you can put stacking/support modules directly into your sub. Why create an extra stacking sub when you can make the stacking modules part of your main sub?