Yeah, if I were Microsoft I would implement spyware in a way that is least intrusive to the user experience. Prioritizing the telemetry data using QoS would only incentivize users to find ways to disable the telemetry, while providing no benefit to Microsoft. What’s the use for them receiving the telemetry data slightly faster, it’s much more important to them that it arrives at all
There are sadly no worthy FOSS alternatives, at least for real work. But for creating memes gimp would be plenty