Roan Kattouw wrote:
Why would we want to allow moving one category on top of another? Why not ban it, and allow people to create a redirect if they want to "merge" them?
That's also an option, hadn't thought of that.
Roan Kattouw (Catrope)
Merge it with other requested feature: blue category links (used categories should be trated as existing). So when you add a inexistent category, the category page is automatically created. A warning step could be placed before auto-creation, which is good, since you probably don't want to use a non-existing category. Or you could use a switch to force added categories to exist (if you want a new one, separately create the page).