I'm not sure that hunting through categories to find the setting for the addon is actually better than scrolling through the list.
From a usability perspective, my personal preference is that each addon has it's own settings page and it's labelled with the exact same name as the addon so I don't have to remember who the author is.
Scrolling really isn't that much effort.
For me, the only really issue is that addons aren't listed alphabetically, but Options Restacker takes care of that.
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