To me, the motion tracker, new sculpt tools, and poly pen tool would probably be the main draws for people to keep C4D in the pipeline, as for the others…
- A specialized cog primitive - someone could code this for Blender as an addon, it doesn’t seem to make a whole lot of sense to hardcode something this specialized.
- Customizable object library - again, something that could be more for addon makers than something to hardcode (other than the functionality needed for true parametric objects, though I guess it could serve as a very useful time-saver and you don’t have to worry about it breaking).
- Reflectance layers - just how many special rendering features will the team at Maxon code before they realize that they can just change the material system to a node-based one and offer near-unlimited power?
- Deformer offsets - okay, I can see some good use in that
- Solo mode - don’t tell me that Cinema couldn’t isolate objects in the viewport by themselves until now
Overall, looks like their users will have a bit of good stuff to play with and use in their everyday work, but I question the tactic of spending time to create specialized tools over creating generalized ones that can do those same things and a lot more (the Poly pen tool for instance is an excellent example of the type of general tool that should be worked on).