Actually, I dont see how copying Bogus' commands may pass for a game quirk. There are some program bugs that become a feature, but then there are bugs. You cannot say that hex-editing a 2h file is a feature, can you?
I could've agreed that having a casting mage retreat after wrathful skies is a clever move too, but there's one notable exception to that rule. Wrathful skies + sacrificial fodder is something I'd call a feature; Wrathful skies + AQ or Seraph is unbalanced and thus its bug, imho.