I don't understand the design logic here .
Long ago , i play a Korea game called priston tale and bosses don't drop fixed item , mobs do too , boss only have higher rate to drop stuffs compare to other mobs .
Then back to other game and we see boss camping . Then they create instance so everyone can have boss drops
So the question is , do we ready need instances ?
Specially in those game where 99% of the game is for solo player , why even bore to add forced group contents like instance ?
In first place , instance create many problem , make you harder to check the cheater . Why bore with it ?