I don't mean to sound argumentative, but I don't see this happening. They just want to be Anglicans in communion with Rome. That's really all they want. I don't forsee a great deal of interaction between these Anglican enclaves and Catholic ecclesiastical structures. I don't forsee the vast majority of catholics even being aware of the development, once it happens. Nor for that matter, will most "remaining" Anglicans make much of a deal over it.
I think people are really getting carried away with this. The ordinariates will continue to operate in pretty much the way they always have - inlcuding electing their ordinaries (episcopal elections will be subject to papal approval). The difference will be transparent to most people outside the ordinariates, but will be deeply felt and deeply appreciated within them.
At some point, perhaps fairly early on, some kind of superstructure might be put together so that Rome isn't dealing with dozens of separate ordinariates who don't deal with each other, but that certainly remains to be seen.
That's OK. You are welcome to disagree with me. I guess we will have to wait and see how all of this plays out over the next couple of years.