Hi,
i know that some features take time and motion blur is not an easy task. But it is essential in a modern render engine, and it is working in max. So it is not a crazy idea from an artist who wants a feature that nobody else needs. :)
I have to say that I´m overall quite happy with the development and the implementation in C4D, so good job, thanks!
I uploaded a file for you to play around with deformation blur: 1546983341_Horse-MB.zip
hope this helps and keep up the good work.