Elitist! Just kidding. :P

I doubt they'll add it in, as there have been times I've run something and seen someone get the achievement, or whatever notification at the end of the fight denoting their first kill, but they were one of the most skilled/best players in the group.

There's been a number of fights I've managed to hit about 10% or less on, but the groups just can't seem to get that final bit to clear it. Does that make me any less experienced than someone with a clear? Heck no. I've just had the unfortunate luck to be with seven other people who didn't make the clear a reality.

A person cannot be blamed for others fails. So it's honestly easier just to remove a single person being problematic, than to tell everyone who's been stuck in bad groups that they're bad for their luck. If the tables were turned and you were the guy with bad luck, I'm sure you'd be calling out the people saying your 'non-clear' made you "ineligible" to even try with their group. :P