You seem to be missing the major iisues why a primal is a problem.
Primals need to exist by using up Aether which in turn destroys the planet.
http://img2.finalfantasyxiv.com/acci...6efc220bdd.jpg
Source:
http://forum.square-enix.com/ffxiv/t...ure-of-Ascians
Being a likeable Primal doesn't negate the problem. This has nothing to do with rituals, this has to do with basically "climate change" you can ignore it and just assume a future generation is going to deal with it or actually work on the problem. Similar concept of saving the planet in many FFs before this one. Questioning faith, another similar theme in prior FFs.
This is my theory or at least connecting the dots on what's going on so far.
Hydaelyn (the will) who speaks with us is a Primal
Hydaelyn Primal
IS NOT Hydaelyn the planet
Elidibus in the trailer mentions BOTH Zodiark and Hydaelyn are primals
Elidibus also mentions One True God (and says that's Zodiark).
Elidibus also appears to have a different endgame that isn't the same as the other Ascians.
So it's possible that he sees Zodiark differently than the Ascians ie the ones the Ascians follow are a primal but the one Elidibus thinks of is not the same...(which may be a different primal vision of Zodiark) much like how there were different incarnations of Titan and maybe why that scene was important to note with Ga Bu's summoning of Titan (it reiterates how primals work and depending on the summon, it's not the same one).
Of course Hydaelyn and Zodiark being the oldest of them (if we are to believe Elidibus) does bring into question why it was seemingly forgotten long ago, and why the 12 became a more ...popular mode of worship? It may have something to do with the split or that Hydaelyn as the Will is more benign and people wanted to worship something that ...may have more impact on their fates? (At least what the people believed to have more impact)