User blog comment:Muffintehbrony/Poppy, the champion not many give love to/@comment-4434378-20140305224713

The only sort of non-rework changes they could make that would limit her OP strength:

+Lower mana costs

-Nerf Ultimate

Anything else would require a full rework to keep the girl from not becoming what Nasus was 2 months back.

Either play her as a counterpick to certain top laners, or use her in the jungle. Either way you are going to spend all your time playing for late game, at which point you can zone out the entire back line by virtue of your ultimate.