Well gold I can see, as it's needed to convert souls, ironite is always nice in my opinion. But.. gold rewards should be REWARDS, like 1-5MIL at the upper tiers/fills.. not "just enough" to convert a few souls.
Players save and plan for vortex fills, and often getting them early on is a very rare thing. Maybe it's become more frequent, but those upper tiers should really be great rewards.
And I could not possibly agree MORE with Amarthir about the fragments at the upper tiers. Completely pointless.