i think i just figured out what makes poppy so frustrating to lane against.
9/10 times her shield actually lands on the ground, it lands right next to a fucking wall.
like every 5 minutes it lands in the center of the lane where you can finally try to contest it so you can follow up with a trade. the rest of the time she keeps picking it up for free, because youd get your face smashed in if you tried to go for it.
if you want to nerf something in her kit, you dont even need to reduce the shield timer. just reduce the frequency at which it lands next to walls.