I have a request for a new feature (new workbench maybe?). I would call it 'presentation model workbench' or something.
This feature would enable a user to prepare a digital document of his/her design for presentation purposes to a client, such that when the client downloads the file and opens it, he/she will be able to navigate around- and into the object using the same navigation tools the user uses on FreeCAD while constructing it - as shown on page 31 of "A FreeCAD manual" compiled by Yorik van Havre - but without being able to tamper with the document or alter it in any way and without having to download the whole FreeCAD program to be able to view the presentation.
It would also be nice if the client, like the user, can have access to the "The combo view" so as to enable him/her to switch the visibility of components on- and off to enable the client to strip the design layer by layer to be able to see what goes on on the inside.
This function could later on perhaps be expanded to include full rendered objects using raytracing etc. but for a start just being able to have a client navigate a basic solid- and/or mesh model would be very useful.
A comparable proprietary equivalent that comes to mind would be VoloView for AutoCAD.