I don't know if this would be considered a feature request. I have installed the Beta on a non-production server though I have selected less critical production servers to monitor. The result was an upgrade of the agent which I expected on these servers. So the question came to mind at some point I could have 100s or even 1000s of agents that will need to be upgraded. If there was backward compatibility the agent upgrade process could be completed over a period of time after a upgrade.
All agents have a compatibility layer which allows them to connect to any Orion server and be upgraded automatically.