Assuming it should be (at least) one or the other, is a retag request (ie: the recent "Please change 'db-design' to 'database-design'" question) more of a 'discussion' question or a 'feature-request'?
As a "do-er" of these, personally I find it easier to have separate questions marked retag-request and (to satisfy the mandated tags) discussion. This allows separate tracking (IMO, a good thing), and allows me to monitor the tag. It also invites the very necessary input (i.e. discussion) from other users, without it being buried on page 3 of an über-question.
With a single question it is really tricky; I have to keep scanning through pages of replies (which is trickier than pages of questions, since the questions page is optimized for this, and displays status etc).
I think that by asking questions, and tagging them with
[retag-request], it gives us a better platform for discussing the changes to be made.
If someone has a problem with how these decisions were made, we can direct them to the relevant question. Were they can see the whole discussion easily, and they can leave a comment, or "answer".
In these questions, the community gets to vote, up and down, any action to be taken. This will also make it so that the action that has the most community support, will be at the top.