Deep Updates

In section   8.4 Deep Inserts of OData-Atom-Format-v4.0 it is stated that 

"Deep inserts are not allowed in update operations using PUT or PATCH requests."

This is a great pity, as supporting deep updates would enable the very common scenario of saving a document with its lines as a whole.

Could it be possible to add this feature?

Vasily Kudriavtsev
1C, Moscow
www.1c.ru