Poppy shouldn't scale bonus AD
She should scale total AD instead. Every one of Poppy's abilities that scales AD, scales bonus AD despite her intended role as a tank.
If her base AA damage is such a problem that her abilities have to scale a stat she doesn't build, then cut her AA damage and make her scale total AD so her abilities can actually make a dent in this weakened-sunfire game state.
In before the people crying that Poppy was OP when three items and a mastery that worked better with her than any other tank were buffed. Since those items and mastery were rightfully nerfed for everyone even despite nerfs, she's stayed at a steady 45% winrate. She wasn't the issue, but she suffered for it.
Usually, bonus damage scaling is reserved for divers because they're the ones who are supposed to be building damage items. But this is an odd case.
And I now she's getting a slight %HP damage increase on her Q, but that won't make a difference for her other abilities, and definitely does nothing against Cleaver's massive advantage over sunfire.