I've mulled over Godblooded and Exigent since my previous Exigent post, and while I don't disagree Godblooded could fulfill similar role with Exigent upon new edition... well, my expectation already set, you know? Like to me, Godblooded is more 'attached' to their divine parentage. After all, most common way of getting them is via a god doing things with a human. They might be more or less powerful, they could stay 'mortal' or ascend to Godhood. That sort of thing.
While Exigent, being Exalted, is more independent to me. They got usual deal, got power and the gods can't take them back short of murder. They got selected in some way, that isn't just because of divine inheritance. Basically, more free agent.
Of course if it's 'just' custom Exalted or equivalent is desired there are many ways to do that aside from Exigent - Devil-Tiger is one. But we got Exigent, and they do the job well enough.