Outsider's view re: contributions - more granular approach needed?

In my experience, spontaneous collaboration happens all the time.

• There's the asynchronous pattern, where one person creates a stub, another person expands it, another person researches and cleans it up, and someone else brings it to good or featured quality.
• There's the "we both like this article" pattern, where two editors both care about the article and feed off each other. Here there are more conflicts. But when people are working in good faith, a little discussion can resolve the issues.
• There's the "hey everybody, let's do something about this" pattern, where a bunch of disparate editors all end up working on an article. Lots of WikiProjects have a "collaboration of the week" that looks like this.

The only thing you're talking about is the canvassing-type collaboration -- a bunch of editors with the same viewpoint working together to enforce that viewpoint. I agree it happens too often, but I think the other types are at least as frequent.

What Alexkai is proposing would not feed into that. It would match editor skills with content needs. That's much more effective than throwing editors into the deep end, where they might not have the skills to improve certain articles, and there is no guidance about what those articles need.