In facts, with this functionality, you can go step by step in the forms, saving the data between each step, and at the end you can finish with a fly. And after, the fly page, you can redirect to a collection layout filtered with the cid number, etc...
There no more limits.
For reuse of the cid value, there will, in the future be a better assistant to select throught all possibilities.
Means, that wherever this table is referenced, it will be possible to link and prepare a page before showing it.
Filters as I said before, but also new FK form instance prefilled with this value.
Maybe it seems complicated, but, when you'll see, it's very simple and useful.