If I understand your suggestion correctly, this might already be discussed in another thread. If so, I suggest you comment/vote in that thread in order to avoid distracting votes.
Currently, you can only “broadcast” published collections to all users. This suggestion asks for an option to share a specific collection to a specific user’s home screen – this would allow you to create per-user collections (e.g. as a smart collection based on labels) which could then only be published to that user.
