It's possible I'm misremembering, but doesn't Gen have visions of the Sacred Mountain exploding as well? At the end of ACoK, there's that bit where Eddis tells Sophos about her dreams and adds that "they aren't dreams" to Gen, the veil is thin and he walks gingerly, etc. I seem to recall that Gen had some inkling of it before that, though. He's awfully homesick in KoA...maybe some of his nightmares weren't just about Attolia.