See the summary in the first post here (under “changes”): ads-b-flight-tracking-f21/piaware-mutability-packages-released-t19751.html
Other than the policy/layout/packaging changes there is really only one new feature - the ability to specify a feeder ID (MAC address) manually.
If I swtich to piaware-mutability should I open port 10001 back up? I currently have it disabled.
I’m not sure what you mean.