No, this makes the reward stupid. I will tell you why. It’s RNG based, doesn’t matter how good or bad you are, if you find a group that worked out, you will kill the boss. If the group doesn’t work out, you won’t kill the boss. It just don’t matter how good your own “skill” is. I bet that there are also players way worse then you, and they managed to get the kill, because other players carry for them.
There are people who claimed to have played with 15 to 20 people in one instance, while I don’t get more than 7, how fair is that?
I also had two times level 12’s and 15’s in my group, this also decreases my win chances. Yeah, epic cosmetics…
Diablo 4 isn’t technical ready for these kind of events, period. We need matchmaking or group finding mechanics, to find decent and full groups. And now many people miss out a cosmetic, while this is a test and it doesn’t work out.
I would say, everyone who tried a few times should also be eligible for the reward.