Both ARR and HW followed similar lines, arguably each have three arcs:
1) a 'main story' if you like, ARR being the Garlean invasion and HW having the war with the dragons
2) a series of disjoint Primal fights with frankly very little connection between them
3) a side-story dealing with the Acians
1+3 could be considered parts of the same, the Primals are clearly unrelated and IMO simply there to provide the excuse for more instanced progression gating, I find these fights entirely pointless as far as the story they're running concurrently with.
