I would like to share my experience with you in order to suggest an improvement to Cubase that would be truly amazing 
I have been mixing on Cubase for many years now.
I also do video editing using Adobe Premiere Pro.
Premiere Pro offers a very interesting feature: integration with the website “Frame.io.”
This platform allows me to collect client feedback when I deliver a video edit.
What’s particularly useful is that when a client leaves a comment at a specific point in the video, I can see that comment directly on my timeline in Premiere Pro.
It would be absolutely fantastic to have a similar feature in Cubase.
Using the same principle, the client could leave comments regarding the changes they would like, and I, as the mixing engineer, would be able to see those comments exactly at the marked position in the Cubase timeline in order to make the requested adjustments.
This would greatly improve the workflow, especially between the client and the Cubase user.
Thank you for your attention.