This seems necessary and desirable, but pretty much a government function. I can't see how simple good-faith cooperation prevents abuse.

Possible abuses:

(1) Use the information to actually interfere or collide with satellites

(2) Use the information to track secret satellites by excluding traces from non-secret ones

(3) Free riders gaining secondary access without providing data

(4) Use access to this when traffic is more contended to enforce hegemony

(5) Anti-competitive coordination under the rubric of cooperation

And while the system might be helpful under ordinary peacetime conditions, will it make a war more or less destructive?

It's silly that NASA is planning for Mars and the moon but hasn't already solved this coordination problem on a world scale.

NASA already provides publicly accessible tracking data. They don't have 30,000 star trackers in orbit though, whereas the world's largest satellite constellation does and therefore has a lot more data points.

As far as I understand, bad faith actors already have wide possibilities for disruption and abuse. This system allows for better good-faith coordination for mutual benefit.