I also have an interest in getting better control on the rendering parameters.
Here are the constraints I experience for the work I do, as a furniture designer.
1- My renderings of furniture include many parts, as many wood components need to be rendered with a specific wood grain direction. Exporting 50 pcs individually is out of question.
2- I must keep parts as separate objects in order to maintain the capability to edit the wood grain.
3- Other brushed textures need to be painted on objects. I looked at Photoshop, but not enough to grasp the work flow and use it. But it would be great to be able to paint directly on the surfaces, like in PSD.
4- On painted textures, I wish I could have the texture "fibers" follow the direction of the parts. Imagine a hand painted texture painted on a tube that changes direction...Wood grain cannot satisfy that. Imagine a brushed stainless steel finish following the body direction...
5- I wish there was a texture editor in Fusion. There is a lot of features in the advanced pane, in the material editor. Where is the documentation?
Fusion sculpting is great for cushions. I wish there was more choice of materials offered by Fusion360 for material edition.