I think the ION classic is the only console that doesn't have backlit keys running version 3, and the new extinguish mode therefor has no indication of what state the desk is in (other than all the lights are off and the monitors are black). Having seen extinguish on my programming wings also I think the overall UI effect is not the same, and could potentially be confusing, it also leaves the desk with no immediate way to assess if it has frozen. I don't have an immediately better suggestion though, perhaps some text in the corner of the monitors or something like the heartbeat on the full screen magic sheets.
Thank you for your report. This has been written up for consideration.