Feature Needed: Staggered Rollouts

Hello,

As someone building an Ubuntu Touch application and recently taking part in the Q/A at http://summit.ubuntu.com/appdevweek-1403/meeting/22130/give-us-feedback-on-the-software-store/, it came to my attention that the Ubuntu Touch Software Center / Store does not have the ability for developers to have staggered rollouts / limited betas.

What is a staggered rollout? A staggered rollout is essentially a method of launching a new product, service, etc. and/or an update to said product, service, etc. in an incremental way that allows the developer to gauge feedback or catch issues that may have only been noticed by end-users, improve on said feedback then incrementally rollout the update(s) to more and more of the userbase.

I think it is important to implement this feature to allow developers to more easily gauge user feedback or catch unnoticed issues without releasing said version to 100% of their userbase. This staggered rollout feature currently exists in the Apple App Store as well as the Google Play Store (this is relevant as I'd like to think the Software Center experience should be on-par, if not better, than existing stores).