Poppy needs some love
Very poor transition into late game, isnt anywhere near tanky enough even when fed as all hell. Compared to other top/supports/jg she doesn't have the shields and healing to survive late game, her passive just shouldn't need to be picked up at all. First hit ranged attack that grants a shield, she is such an all in champ having to break off from your target to pick up your suitability is something no other top lane has to do at a detriment, and were talking about a champ with little to no scaling, why would she have disadvantages like this built into her kit.
I don't know where she is supposed to compete with other top lanes like Darius,Illioa,Garen,Urgot,Nasus the only unique thing she brings is her W, she lacks any actual zoning potential other than it. Her Ult is... man its just not what it should be, I would personally remove the charge up mechanic, and make the aoe larger and give it a damn reticel so people know who they're going to knock up! Her ult currently has the potential to underwhelm or vastly over preform. An with my many games The latter is a once in a blue moon scenario.
I think W needs better armor and MR scaling, and the HP limit should be 75% or even higher, having something that is dependant on not getting burst down when the whole game is a burst circus is very bad. Up the passive scaling, and let the double effect be activated when W is used. You can go in take hits till the passive HP thresh hold takes over.
Q is such an odd placement on her, HP% dmg its high, with a low CD. How often does the 2nd hit land on a non CC'd target, not very often. I just dont understand, is she supposed to be a tank killer? Cause she isnt at all, there is not one tank I can think of where I would stand her in a field an throw down 1v1.
The real fun of playing poppy comes from landing a charge and your team following up, also something 90% of current tanks dont need. Most tanks now will kill their targets on their own, poppy even built very heavy on dmg will not reliably 100 to 0 a target of = power. With ignite a full combo with a lethality build can work for picks, but she loses all team fight viability.