Feature Request For Load Balanced Sites

This is a feature request for load balanced sites. It would be good if instead of manually adding a site to each server I want in the load balancing pool instead there was a master list of sites and from within the site details you could define which servers the sites where enabled on.

The current way works for sites which should only be on a single server at a time but in a load balanced environment any changes to settings or the env variables need to be made on each server for the app instead of being global.