There are too much other lists. I would prefer to have only one mailing-list instead of packages,.... because it gives a wrong feeling that nothing is happening.
I must admit I prefer the focused discussions that happen to take place on the individual lists. Also I think that if you take the team model seriously, then PR is part of the job of a team leader so I'd expect them to give regular updates. But other than that it feels that some actual work is getting here and you know who is doing it and messages don't get easily lost in the (otherwise unrelated) traffic which is too commonly the case on Squeak-dev.
Cheers, - Andreas