I don't see Poppy ever making it to competitive play with that kit(Unless it's some max disengage crap comp.). And if to be completely honest, she doesn't look like she'll be that good in SoloQ too, unless her base stats will be nice.
W is only good against champions with dashes.
R seems useless as fuck, unless you're disengaging.
E is alright, I guess.
Passive is awesome tho.
Maybe some specific itemization path will make her stomp. Interesting.