As explained in the "Surface-Based Asset Generation" thread the 'secret' for clean bevels/chamfers seem to be to inset each 'plane' of the mesh first. If we could get an 'Inset' modifier with a "by smoothing group" checkbox or if that is simply added to the chamfer/quad-chamfer modifiers we should be in the clear.
I'm aware of that, and I'm implementing a new feature with a different approach... Meanwhile there are the commands with lowercase "C" flag that allow cleanup of the mesh before bevel or crease and it's already more closer, even if tbh it's not as efficient as inset method... It's about time guys.