First off, I think Rhino is amazing.
I’d suggest to update the fillet solver. It’s the main area that makes entry level CAD approachable to new users. Rhino is by no means entry level, but finding a workaround for a simple fillet on a tapered surface means the relaxation (and production speed) is over.
CAD is increasingly becoming a must skill in the entertainment industry. Arrimus 3D and others with a big following amongst low caste modeling nerds like myself are reviewing CAD applications and ease of filleting comes up a lot. The market segment is growing fast and the wave might be worth catching given that Rhino is more artist friendly.
Zbrush just came out with an amazing voxel based chamfer plugin. I don’t know how they pulled it off but I can tell they’re throwing money at the demand for hard surfacing. I’d agree with a commenter above, good subd is available everywhere already and for free, so not quite on the high priority per se.