Actually the more I think about it, the more I think we should be able to get loudness meter automatically on every output we create.
Wether you turn it on would be up to you for the sake of your processor, of course.
And loudness meter should be time code aware everywhere…
Regarding multiple loudness meter, it could also be multiple loudness tracks, assignable to whatever track output (not only output tracks, and more flexible this way)
Alerts could be done loudness track by loudness track then…
There is room for lots of improvements regarding loudness, but the short term history presented on the loudness is still right now an exclusivity and a really brilliant idea imho.