We have just discussed with the developer's team the three feature requests and the overall opinion is that all of the requested features sounds great and indeed will be a great addition to RadDataForm.
Of course, some further investigation is needed. Meanwhile, our developers ask if it is possible for you to log all three feature request in this repository
where they will visible from the whole community so that there can be further discussion and suggestions. Please add as much as possible information about the requests including possible scenarios (just as done in this thread).
Telerik by Progress