Would like XD to work with InDesign in much the same manner that AI and PSD files do. This might be more of a feature request for InDesign however I imagine they both play a role in working together.

Ultimately, in order for a design to be implemented correctly, we need to provide a detailed UI specification for engineering. This specification is often worked on by interaction and visual designers which is part of what makes InDesign an ideal solution for us.

The prototyping functionality is great for communicating how a design could work, but we still need an accompanying UI spec in order for it to be built correctly. This document is also used as a reference for QA down the line to validate the implementation.