They Should Add An Official Damage Meter With One Condition

[Yeastyloins]

Best place to put a damage meter would be to attach it to the "record" feature, and then they just remove the limitation on what missions you can record.

Once it's recorded, a few minutes after, the next playback gets you bars and details and breakdowns.

Should be trivial.

That ok for reviewing footage but monitoring damage/healing/damage taken metrics are important while you are actively doing the fight itself to see if there can be improvement in the moment. Your group tries one strat and then tries another strat and see how far they got and whether or not there was an increase in performance.