As a Roblox developer and business owner, operating a studio running in the Roblox platform, it is currently too difficult to ensure QA testing and granular play permissions for developers.
We use a separate place for each project where it’s a Private version of the development build meant to be used for QA testing. This can be with our QA testing team and/or the developers themselves.
While it might be doable to make the game public for one or two games (albeit cumbersome since this requires scripts to ensure only QA testers can play), this quickly becomes unscalable when there is a large QA team or multiple projects.
It is currently hard to give Project Managers authority to run QA testing sessions without relying on the place being made public, which exposes it to the wider audience of people checking out the groups.
The ability to add groups to the Play permission through collaborate being added would be a great addition to the Collaborate toolset and would make operating different projects easier and more straight forward.