From my prospective, it made her gameplay more autonomous/less controllable, and she became a win lane or lose game champ.
Old Zyras early game was not as strong but that was balanced around her staying relevant as the match evolved.
Almost everything in her kit was slightly nerfed(especially Q shape/distance) to make room for ostensibly stronger plants.
Gameplay revolving around aiming spells at randomly spawned inanimate objects is super lame anyway, her kit was already uber fun spawning them manually as well as skillshot passive(SO FREAKING FUN)
Anyway, what am I missing(besides old Zyra ): ?