I think that all of the DB clips, and maybe even the Level 5 VG clips should have sound all the time.
The Application Software, has the choice for Sound or No sound. So the user can decide to hear it, or not..
I know from being in the QA, that during some shoots, there were problems with unwanted noise, so for those clips the sound had to be removed.
But as the Sound stage becomes a regular part of filming, I'm sure there will be less and less problems.
Please keep sounds in all clips. It does not matter what Language the Models speaks. She doesn't have to speak English to keep the sounds. What is important, is that it is natural and not faked. Let her show and vocalize her natural excitement.
She can talk to the audience and express what she likes, and how she would like to be touched etc...
It becomes a more immersive experience.
Maybe it doesn't have to be in the Demos, or only have sounds in One Demo clip as an attraction to entice the user to purchase the full card.
But As long as there are no sound troubles during filming,
MY VOTE is to keeps the sounds in all clips.