I think removing Balance and/or Arrow would be a little heavy-handed for an Astro nerf - they might reduce Balance's numbers again though. I like the idea about stances for WHM because of Assize, and we are the base class for Clerics so maybe getting a trait for it is something SE could do. Anything like from Lost City of Amdapor (Hard) would be amazing. It was hard running that dungeon and seeing all of the white magic we just don't have (Water III, Flood, Libra, Reverse, Reraise). I know it was an ancient city from the height of white magic, but maybe would 60 => 70 class quests could be about decoding some Amdapori knowledge.

I like the idea of Stoneskin II in combat, but am a little hesitant because of its pretty hefty MP cost and cast time. You'd probably be using it with Swiftcast, and it's only 10% of a party member's HP that is protected than a blanket 10% damage reduction. However, with HP increasing as we get to level 70 and more gear this could outweigh the other drawbacks.