Hi ShaneG
Some things you may not have considered:
1. The ability to test the Radio Service before it goes to users has been requested by multiple developers.
2. If this 12 hour lead time is not during office hours (which it can't be for every time zone), there is no chance to test, find issues, and report them to you before the publish to the Play Store.
3. I do not know of a way to know that you have decided to push an update to GitHub, without constantly checking manually (which is not a reasonable solution).
4. Even if we did happen to check for a GitHub update when you have just done one, and before you have made the Play Store update, finding any issues in time to prevent a bad user experience assumes that we can put all other priorities on hold and run all the tests in the time available (which is also not reasonable).
Thanks.
R