I would absolutely love this as well and it's come up in discussions before.

I think the tricky part is figuring out how to associate all the variables since Save to Repository could also have file uploads involved.

Each file upload field gets its own section in the Save to Repository, and to complicate things further, each upload field can also have multiple files.

Not saying I don't think it's possible or anything, just complex.

Personally, the file upload entry ids are usually more important to me than the forms themselves, but I absolutely see the value in having the form's entry id.