Things I accomplished:
-Level 99 SMN, didn't go to Abyssea until 75; Geomancer is like 93 or something
-Nation mission rank 6, Dynamis unlocked and farmed on multiple days
-Zilart beginning
-Aht Urhgan complete, Alexander/Odin
-Chains of Promathia complete
-Zoned into Wings of the Goddess at like level 50, got eaten by a random mob, didn't go back
-3 pieces of 109 AF armor, along with some relic armor
-Barely touched Abyssea "progression", never managed to kill a single zone boss
-Completed various other quests (max gobbiebag, all avatars including Fenrir, Evoker's Ring, the list goes on) along with farming/hunting for various SMN specific items
-Did not touch Adoulin; never got a good reason to go there, wanted to explore it with friends, but friends got burnt out and quit before we even got that far. Beyond that, from the looks of it, it looks like more time gated content (coalition?) and all the other things above seemed to provide better armor/items/worth than Adoulin.