The real FAQ for your site should live here - and you should populate it with whatever questions come up frequently, ideally by transforming one instance. If you can't easily close common questions as duplicates of FAQ entries, there's a problem.
It's actually kinda shocking that you're suggesting a long-form site FAQ when there are only 6 questions in the meta FAQ - if something isn't covered (or is buried within an existing but overly-broad FAQ question), then it should be there first.
If you find yourself referencing a particular FAQ excessively, then it might be time to think about featuring it more prominently in the site FAQ.