That's a nice idea. I don't know how useful it really will be because setups aren't typically a 'one size fits all' affair and you still kind of need an idea of how setups work to realise what changed and could be further adjusted to the exact track conditions and your driving style. Guides on how to set up a car are much more important than 'off the shelf' setups. But it'd be a good start.
Btw. this exists for Assetto: http://www.racedepartment.com/downloads/the-setup-market.10149/
Btw. this exists for Assetto: http://www.racedepartment.com/downloads/the-setup-market.10149/