For context, I am very familiar with KiCAD and somewhat familiar with Eagle.

I think KiCAD gets a lot of things right. Some of the broken things:

parts management (There is no central repo, a la LVFS, where I can get a part/pinout/3d model to easily import)

export process (feels kludgey, although some manufactures take the native KiCAD files)

multiple users, same project -- it's hard to put artifacts into git and merge changes.

I see this solving the last issue, perhaps the second as well. Commercially, I think it is worth pursing the first.

Other thoughts:

When I spec parts for certain types of designs, I need a whole lot more than just tolerance. e.g, for a mlcc capacitor, I need to spec dielectric, voltage, tolerance, ESR, sometimes leakage. For resistors, inductors, and other jellybean parts, similar metrics apply. Specing active "common" parts (like bjt/fet, diodes, etc) has even more parameters to consider.

I would also love the ability to take a design and drop it into SPICE for simulation.