The more I think about it, the more it makes sense just to use your already existing Updater instead of writing my own from scratch. There's no need for conflicting or competing systems, especially when it's really important for the add-on community here to be huddled together under one umbrella. I may package some things for the in-game downloader of course to ensure everything goes smoothly and to centralize GUI, but that's all. No need to reinvent the wheel!