The aura of Shyvana's burnout should do more damage and her autos do less
This would enable her to be easier to balance and would make her kit show better clarity both for her and her opponent. Currently the area around her in burnout doesn't do all that much damage but the buff to her auto attacks while burnout is active does a good deal of damage. The problem with this is that she becomes reliant upon on-hit auto attack items to succeed which is great when devourer comes along but lousy when it gets replaced by guinsoos. It would also make more sense thematically in that her fire damage is actually doing damage instead of giving her extra punching strength.
for
. Works great with her E and does wonders against high AP comps. But I would also consider more damage to her burn out instead of her AAs too.