Full disclosure: I have only surface level understanding of how ansible galaxy actually works on the inside.
My exposure to it is rather limited and it's possible that all of my concerns have perfectly valid responses I'm not aware of.
Furthermore, I do believe that we could utilize ansible galaxy a bit more than we do.
That being said, I do think that we should be cautious when changing the way we package and deliver.
Even if everything works out we are possibly setting ourselves up for a whole new set of possible problems we are unfamiliar with.
Whether that is an acceptable risk or not is a question for a different avenue however.