For example addons like HandyNotes have a ton of plugins in order for HandyNotes to be useful, and rather than having to look them up, they can already be integrated to the main addon's page so you can see all the compatible plugins for the addon.
For creators, you can give them the choice while uploading their mods if it's an addon or a plugin, and if it's a plugin, allow them to choose what addon is the plugin for. You can implement some sort of voting system for users to determine if the addons/plugins work or not for management.
Hey there, thanks for the suggestion!
What do you have in mind when you imagine a Plugin Section?
Plugins are supported project types in CurseForge and can be categorized as such by the creators, similarly to what you've described (https://www.curseforge.com/wow/addons/plugins)
As for the content voting system, this was suggested in suggestion https://curseforge-ideas.overwolf.com/ideas/CF-I-61, and I think it applies in what you've offered as well.
For this one, it's still not on our roadmap and planning, and we will check it out in the future once we've done transferring the client and website and achieving stable and functional versions.