Reasons for the new dungeon?

So ever since the new patch people have been farming the dungeon a lot. Most I've seen don't really like it but want the legendarys and other loot you can get to either sell or max their character. This being said i can make about 300 gold a day just running dungeons like LavaLight, Carleon, And Ruins of Matren. All 3 of the dungeons i can solo will drop about 10-30 familliar orbs depending on the dungeon. and i have about a 20 min break in between running all 3. So right after i run the dungeons i can run Frost Keep in which if i get anything good i can sell that for pretty good money too. it seems like i really dont need to go to the new dungeon as at this point im a 7k dps Zerk with 50% physical crit and almost 20k gold to spend on maxing when people get the new gear.

If anyone finds a good reason to actually grind the new dungeons please let me know.