Competence Check for Group Content

[Arohk]

Okay, that's your definition. Even some of what you list would need further definition (like what is proper mitigation management) though overall I wouldn't really disagree with it.

not using all your defensive cooldowns at once,
not using Party Mitigation when no raidwide AOE is happening,
not using magic mitigation when the boss is doing physical or neutral damage (only regards GNB and DRK)

As an example (and this really is one of my pet peeves with some players) DPS standing in front of the boss so they get hit by cleaves intended to be taken only by the tank. Is it annoying? Yeah. Does it cause the group to fail? Generally no.

If a melee dps stands infront of the boss, he already fails at his basic rotation, because you have positional attacks from behind and the side, dieing to a tankbuster or bosscleave is just the cherry on top.