Hey Danny,
Thank you for the extra context.
For our specific issue with using FUDPPing::UDPEcho we have a few avenues to mitigate the impact.
For more general uses of EAsyncExecution::Thread throughout the engine, are there known issues with switching over to use the unified set of threads? The engine has several uses that would have previously used the old split, and now those tasks are running from the same pool.