This has been talked to death, I'm sure, but I'm bringing it up again because when you're literally sitting there for a solid 30m straight watching M5 burn with two tanks sustaining each other as GNB/WAR, it is boring.
Mechanics are nice to do, but when you've messed up since it's your first time through and you're forced to watch it go all the way from 30% to 0%? It's bad. VERY BAD. Even if we can talk about "skill issues" the problem is still going to repeat itself: Tanks are in a position where they can duo any raid content on Normal mode that doesn't have harsh party LB requirements or mechanics that force the Tanks to do something.
I'd rather enjoy wiping than I do just having Tanks steamroll a fight, because that's part of learning. Some of these people have it their first time through and will never do it again because they get pushed through by Tanks, so in all honesty we need a fix in the next major balance patch to prevent this.
Either outgoing damage on Tanks HAS to go up(Bring back Crit Autos), or Tank Self-Healing has to go down. You can't have both.
Edit: Since I'm starting to see some people try to defend Tanks doing this, I'm going to pose a question for everyone who reads this thread.
How would you feel if you're forced to watch Tanks on their own, with no healers, duo a raid, unable to play yourself because you're dead on the ground?