PROBLEM:
Game needs group content (unfortunately, it was made for solo content. So people ask for aoes,
equal damage. In a solo content environment/spot, everyone attacking with their aoes would make the game
a lag clown fiesta)
Group content relays on trinity system (tank, healer, SUPPORT, dps)

FIX:
1. Group/party content in normal realms: not everyone have big aoes (designed skills for this content), for strong group of monsters, dungeons, raids;
you need a tank, healer, SUPPORT
2. Marni's solo realm: You are just DPS rock-star, can have ur aoes 'cause you dont need a party, but you earn less profit

They tried for group content in the past. 

But maybe what should happen is the edania bosses get opened up for group mode with no gear lock.

And leave the solo mode gear lock 

Group content is the past has often been buggy, and it's rough when everyone has to do perfect, non-buggy play or it's a party wipe (which is the case for certain newer bosses). People don't like this sort of thing, so PA think people don't like group content. What people would really like is for group content to work smoothly.

No. Go play another MMO that has this and enjoy it there.