We reach level 60 Ardenweald and still have many quests left there.
In Bastion I did every quest I came across and yet we are unable to do all of them until after we hit 60, even the story ie Wings of Freedom and The Spear of Kaliope.
I had ventured all across the map to unlock the flight paths in search for quests. I saw quest givers with silver quest markers over their heads so it is clear these are for level 60. There is more sort in Bastion though not sure If I would return there.
Maldraxxus I never wish to revisit that island again too.