I hope there will be a metric gigaton of collectables scattered throughout the zones of 2.0.

There should be a reason for players to explore the zones on their own and find hidden treasure chests all over the place.

They could be tied to metagames like achievements and GC points/gear/you name it/recipes.

Also the placements of collectables would offer nice challenges for player to figure out how to get past or through a group of mobs or even NM's that need to be killed for some chests to appear.

Maybe even hide some maps to be unlocked if all the tokens of zone X are collected? Sky is the limit for variety here.

Since SE is going through the trouble of doing an entire new landscape please make it count.

This would also be one of the few challenges in open world that you could not complete by just staring at map markers.