My alliance was kabammed
My alliance put up 83m in AQ, this would normally be enough to stay in expert tier. But to our shock we have actually gone down to advanced tier.
We thought that maybe we were given the wrong rewards, but after some thinking we realised that the recent alliance potion sale contributed to this as well as the availability of potions in the calendar(s).
We believe that this is helped to drive up the cutoff for staying in expert tier, because other alliances who don't clear 15/15 in 5 x 5 may have been taking full advantage of the sale and using the potions to clear.
Long story short, we have been kabammed!