I will continue to talk about new icons:
As I understand the style was taken from Blender and Silo, but you did not take into account that in these applications the number of icons is much smaller, their interface is more "textual". This style imposes a limitation on the variety of icons, so it is not suitable for Cinema 4d, which has a huge number of icons.
Here are some more examples of the new interface:
- Volume and empty polygon have same icon
- Camera and camera deformer have same icon
- Emiter and point selection have similar icons
- Many tag icons have become smaller and less readable, example Tracker tags
The list goes on and on ...
In Windows 8, Microsoft removed the start menu, then realized that it was a mistake, I hope Maxon understands that changing the icon style was a mistake.