I'm torn on this because I do think DC (and Marvel) aren't quite good at handling this. Personally, I would like Cheshire to be redeemed but that's because I preferred her Young Justice incarnation to the Dragon Lady stereotype of the comics (plus she's got a more tragic backstory than Harley yet is written as far less sympathetic particularly by Gail Simone who thinks Poison Ivy would make a good member of the Justice League). In general, I think this just speaks to the larger problem of writers not understanding the implications of their writing.