I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
A lot of times when they delve into religion, heaven and hell, it works against the cases they make about a moral world, and what that means in the Marvel universe. Religious characters work well because their faith makes them richer - and I'm thinking Nightcrawler here, although Doctor Strange might also count. His faith in higher powers, although vastly different from the God Kurt knows, does make Strange more fascinating.
Logan's descent into hell, and Kurt's voyage to heaven, both left me cold.
Ghost Rider works. Ghost Rider works because he's a good man who made a bad deal with a demon, and heaven and hell and pushing Judeo-Christian philosophies - one of my issues with religion in comics - doesn't often happen here.
The religious issues in this are more complicated, as it seems as angel has made the deal with Blaze from the beginning and he's gone rogue. It's all about the story, not pushing religion to make a point.
Anyway, it's a fascinating starting point for Aaron, although characters like the Deacon were too one-dimensional for my taste. Not my favorite work of his, but I'm eager to see where this goes. Ah, my break is over, so back to work. Sorry this is so short!