Control props aren't actually a new thing. They've been possible for most of Poser's history, they're just newly added to the P11Pro suite of creation tools. I don't think the creation option is in standard P11. Prior to that you had to add them into the cr2 manually. The new feature just makes it simplified without the need to edit the cr2.

As for adding them to older figures, not sure that would work since they require a bone to be connected to. They work on Paul and Pauline because their faces have actual rigging, unlike most previous figures where the facial expressions are all done by morphs. I'm not familiar with a way to make them work on a morph unless the morph is also bone driven.