Got it, read it, awesome... but Avilona has me confused, as it doesn't sync up with the previous campaign history as far as I can tell.
Previously, the explanation for weakened flight was that Ob agents accidentally damaged the planar connection to Avilona by messing with the flying ziggurat 200 years ago -- before that flight worked in the world, afterwards the five minute limit appeared and all flying animals too big to fly without magic were grounded. The idea that Avilona is naturally hard on fliers doesn't make a whole lot of sense to me.
(Also, are we ever going to get an explanation for Gale's ability to ignore all this and just fly with no time limit? Or did that happen and I missed it?)