In 90% of maps the mob density is appalingly low making it almost impossible to farm/grind properly.
For example, in 1 hours time, during off peak season on Telsia server Baron Allerno map, i managed to kill only 60 popolions in 1 hour.
When this game goes open to public, players will triple and mobs will be non existent. I could literally walk for 1 whole minute and see no mobs at all some times.