The issue is that DPS checks have nothing to do with it
1st video, 7 tanks, one healer : Fight starts at 35:28 on the timer, and ends at 26:13, for a total of 9m15s
2nd video, the usual 2/2/4 setup : Fight starts at 51:18 and ends at 42:07, for a total of 9m11s
So, the 7WAR party is not doing "less but enough DPS", they're actually killing it
as fast as the usual setup. Judging by the HP number, I don't think there's a real gap in gear, and we're talking about
Elysium, so I'm pretty sure they're not "half assed" players.
There's definitely a problem.