I think there are some kinks to work out, especially on the random DF end of things. Myself and a friend went in on easy difficulty to test it out and were placed in a party with 6 others. Some observations:

1) Being stuck on the starting island until you find the aether currents seemed silly and unnecessarily limiting.

2) The mobs have WAY too much HP and everything felt like it took forever to kill, even the lowest ranked stuff for the objectives.

3) There's almost no stealth ability, so if something spots you (and it will), you're forced to fight it as the monsters do not leash as far as I could tell. If your party isn't around for whatever reason, you may as well just die and return.

My biggest pet peeve? Combining DoL with DoW/DoM classes. They run off to gather, but still get to roll on the drops the rest of the party had to fight for without their help. There needs to be some kind of battle contribution requirement in order to roll.

Spent about 45 minutes in there and got 3 drops out of 30 chests. Yuck. No thanks. Maybe I had a bad run, but I think it definitely needs some fine tuning.