Relation field - create new item on the fly

Very powerful Flexi may be more powerful if you added the ability to add related units on the fly.
Like on fly ajax-based creating tag(s). The only difference is that creating an related element with the title but no content, or with plug type lorem
In my opinion it is very convenient.
consider for example the case of creating articles with a related field.
I can specify an associated unit if it exists. but if it does not then I will be forced to interrupt the process of creating articles to make a relation unit, and then go back and insert it.
but if the process of creation of linked units was on the fly, I would have continued editing the article, establish a relationship and then would have been in a related article I wrote right content

Hello

there is already a field that is not yet public

- item form you get filters, you set some values in them

Result:
all items that are
-- created or altered and much the set filtering criteria
become automatically related to the item