What they did to Ivy was just horrible . I mean even as kid... I would not have minded getting a rash from that poison ivy. Then they turned her into some white /green things.
Interestingly, this is one remodel they actually explained in one of the comics. One of the last, if not the last, Poison Ivy episodes before the remodel was one where she was pretending to be a reformed woman with a family. She was lying, of course, and her husband and two sons were actually just plant-people. When Batman defeats her, she melts away to reveal that she was also a plant-clone and the episode ends with Ivy flying out of Gotham.
One of the comics apparently imply (or maybe outright states) that the Ivy in NBA is a plant-person and the real one has left Gotham.