I am pretty certain that using an alternative launcher will bring back some kind of app drawer functionality. We should consider customizations that Android apps offer and the amount of devs that would no doubt write apps to take over those functions. I would think launchers like Nova would offer than in their paid versions to sell more product.
Ahh, I wasn't sure how deep the app drawer went into the OS and if it was something a 3rd party developer could make. I know Nova launcher lets you heavily customize it, but doesn't actually create the app drawer itself.