the story here takes a while to get going (2 chapters), but so far its almost comparable to how amazing ruina's was. It is bogged down a bit by it being a gacha, but it's possible to get through all content without grinding for gacha currency.
outside of canto 1 and 2, the entire story has been amazing even in its early stages.
again, the OST is great here, and mili is again the standout of the OST