Everyone should have to use their materials to enter bosslair, groups already have it easier than soloplayers, and now on top of that they can do 4 Duriels while a soloplayer can only do 1 Duriel.
And, of course, when one person dies in the group the other 3 continue on. If the solo person dies it’s game over. Not even sure if you can try again or you have to go farm more materials. Something they said in the stream led me to believe the latter but I guess we will find out.
I think this has more to do with the age of players, not the game itself.
When I waste resources in a game for greater good I don’t expect to get anything back. For me, it’s just a bonus if someone is kind enough to summon the boss.
It’s different if people join a rotation group that have no intention of taking their turn providing mats, though. It’s not like people over 16 don’t understand what dishonesty and being taken advantage of are. If you just join a group running that’s one thing. If you join a group taking turns summoning that’s another.
People will be People, there will be always that one selfish snowflake that will bail.
It better just to accept that fact, and join grups with mentality ready ( prepered?) that someone will bail.