PR is what we call "corporate misdirection and deception." We'd be happy to do without it.
The ODP (and other truly collaborative projects) waste much less time on communication than hierarchical (whether fascist or corporate) structures. When the goal is to EMPOWER individuals to work more effectively, more efficiently, communication that doesn't contribute to that, is deprecated.
We have a name for outsiders who wish to demonstrate a sympathy with the ODP mission and are willing to put in a real effort towards quality control, based on our mission as opposed to some ulterior-motived SEO effort. We call them "editor applicants".
Those applicants whose demonstration of skill and motive is adequate (that is, whose application or "offer to help" is accepted) aren't outsiders any more. And those who can't or won't give adequate demonstration of THEIR goodwill and competance, are demonstrably no fit judges of OUR goodwill or competance.
I'm not sure what you mean by "using a more comprehensive categorization strategy." There is only one categorization, and all editors use it. A good editor is expected to use comprehensive SITE FINDING strategies, and -- this is the REALLY important part -- that means NOT relying on or giving priority to submittals. Instead, it means relying on the editor's own knowledge and judgment to decide HOW to look for sites (that is, what topics need more information and what topics are likely to have more good, findable information) and WHERE to look for sites (that is, what searches to make, what authority sites to review, what offline sources are highly reliable, who else's brains to pick.
Obviously, all of this can be done without looking at site suggestions at all. So why ever look at site suggestions? In a truly comprehensive scheme of site finding, they would be totally unnecessary. But nobody HAS a TRULY comprehensive scheme. So after all else has been done, site suggestions are a way of picking the minds of other people. Now those other people (site suggestors) haven't given any reason at all to be trusted, and therefore can't reasonably expect to be trusted. They are not accountable to anyone, and there is no way to hold them accountable. They do not collaborate with anyone, and there is no way to make them collaborate. They often have ulterior motives, into which we cannot and do not want to inquire.
But, nonetheless, editors will listen to those suggestions that (in editorial judgment) might lead to something useful. And we have agreed that we won't throw away suggestions without reasonable effort to see that those suggestions are meritless.
I think nobody could reasonably ask for more than that.
So everyone has a choice: to demonstrate their good faith and discuss collaboration, or to keep their motives hidden and make suggestions. There's no disgrace in either choice. No choice leads to any control of anyone else -- always, forever, each one does his own work to his best standard as well as to the community standard. No choice allows anyone to require accountability of anyone else -- accountability is through community consensus, and even outsiders have several ways of suggesting where the community might well TAKE account. No choice allows anyone to require anyone else to do anything in particular -- the editorial guidelines are very clear about this (if for any reason you are uncomfortable reviewing a site, or don't wish to review it, then you simply don't review it--no questions asked. If it's worth reviewing, someone else will take care of it.)
You can see how this whole process wouldn't work at all well for serving webmasters. You'd need some completely different process. But this process does a better job of finding unique informational content than any other.
So, we'll keep this process, and use it for what it does well. Those who wish to serve webmasters can set up their own processes, and run them on their own sites, and invite others to help. And those webmasters who wish to receive services, are welcome to take advantage of the thousands of sites who offer those services. We won't be offended.
And some editors may even be among the webmaster-servers, or webmasters-seeking-services, at those other sites. They won't be ostracized. (This certainly isn't the only site I visit.)
The trick to collaboration is simple: find someone who's doing what you want to do. And join them. But finding someone who's doing something ELSE, and hectoring them to do what you want instead, is a waste of spittle and froth.