@Ereshkigal I also found the context-menu change disorienting & understand your frustration.
The reason @mib2berlin would share a feature request from 2018 is because it is an existing request and doesn't require creating additional forum content that needs to be moderated.
Also I would add that Vivaldi has a much smaller development team than a company like Google. There are pros and cons to small versus large teams but, in my experience, @jon and his team are much more likely to review and take negative feedback into account when changes impact the overall user experience.
In the event that you are correct @Ereshkigal and a change to Chromium flags would revert the "Compact" settings change in vivaldi://settings then I would agree with you that the development team would need to implement a fix, but for right now all of the issues I had with the context-menu are fixed, and I hope yours are as well.
Thanks to everyone for contributing to the forums.