OK, Ros, I'll take that as a friendly "look it up!"... Here's what I was able to derive from (re-)reading the pages to which you provided links:
"---
Step 1: Draft the Rule
If you'd like to see a change, start by drafting the style page or help page you'd like to see, or the change or addition you'd like to see made on an existing style page or help page.
You can do this on a free-space profile or in the G2G message described in step 2.
Even though this is a draft, try to write as if it's an existing rule that you're describing. Carefully explain to the reader how they should implement the rule. Link to related rules and explain how they relate to each other.
Put a notice at the top of the rule that makes clear it's a draft. Sign and date this comment (you can sign by entering four tildes, ~~~~).
---"
Perhaps that is an answer to my question, but I'm really not sure. Would it be accurate to paraphrase the answer as follows?
"Thanks for your interest and offer to help, but we're all really busy right now. If you think anything might be improved, your first step is to create a full-fledged alternative on your own, then post it as a proposal and wait for other, more experienced WikiTreers (ultimately 'the Team') to point out (inevitable) errors and (previously discussed and decided) points of policy and preference in G2G."
I may be naive, but I had hoped that there might be one or more other WikiTreers who would be interested enough in the topic to work together on that sort of a draft - ideally including at least some of the more experienced WikiTreers who might be aware of pitfalls which should be avoided.
I definitely do NOT feel that I can (or should) try to create a new Glossary page "as a draft" and then post it as a proposal. So I guess I'll just wait until someone from "'the team' decides to update the official Help: page.