Make difficult content is easy :
-Just make it all hit one shot players.
-Make it so that you don't have time to revive the fallen.
-Make it so that mob has very high HP so that it take very long time to beat.
-Make it so that any little lag can kill player instantly.
-Make it so that you have to do a lot of time sink in order to spawn the mob.
-Make it so that the drop rate very suck badly.

Make "fun" content is the hard part. and this is what they need more.
So far, was there any content in this game that make you feel like "This is really enjoyable! This is fucking good!!" at all ?