I don't think something like this story should be categorized as crack!fic at all. The writing is somewhat inconsistent, but it's certainly not ridiculously crammed with Brian calling Justin "baby," or inane descriptions of dicks. They do refer to ejaculate as "seed," but that's not enough to make me stop reading, and it sort of fits the setting.
There's also some very good writing. Little turns of phrase that make me smile, like this one: "He wanted to grasp Brian's sweaty, muscle-cleaved forearms and pull his lips to his until they thought the same sins." That's actually Michael thinking about Brian, but woah! ...until they thought the same sins???? I love that. I wish I had written that.
And there's this time that Brian tells Justin to come in Arabic and I find it exceedingly hot. I don't know why, but I do.
It's flowery and maybe a bit melodramatic, but I REALLY love this story. Usually with something this long, I get bored and start skipping stuff. I'm on chapter 13 and I haven't skipped anything yet. I'll probably be a little sad when it ends.