In a lot of companies there is a clear separation between development packages and packages approved for production. Systems like Sonatype Nexus and Artifactory provide hugely powerful examples of these catering for a wide variety of requirements, but in most cases you need a simple set of requirements:
* The ability to push packages to one (dev) repo
* The ability to promote packages to another (prod) repo
* The ability to force certain environments to pick from a certain repo

This should be a relatively simple improvement to Octopus' very awesome but very simple package management capabilities.