If I have to delete one of the forms and create another, will that change my "grandfathered" status?

If I have to delete one of these forms and create another in order for it to work will that change my "grandfathered in" status? In the end I would still have the same number of forms, but I would have deleted an existing one in preference of creating a replacement.

As already mentioned in this blog post, unfortunately, it is not possible to create new forms even if you delete a form from the account. If you need to create a new form, it is required to upgrade your account. If not, you may modify the existing form as per your requirements.

Hope this information helps!