These are feature request regarding the manifest:preferred-view-mode attribute taken out of OFFICE-2306:

Add 'sound level' with a percentage of audio level as an option
for situations where there is multimedia included with audio that
should not be used.

It should be possible to define whether the application may ask
to update dynamic objects (like information from a database). If these
objects are in a presentation, and the default application behaviour is
to ask if they need to be updated that might be annoying.