The weird thing is Dini used to write the heck out of Ivy in the animated series and the older comics set in the DCAU. It was when he started getting high on his Harley obsession (and when she really started to break out) was when he stopped bothering to develop Ivy in a way that served
her own character and instead began to write her in a way that served
Harley's character. You can still see the after-effects of this in the way Pam is treated in Harley's ongoing.
But there is a plus side. The army of Harley fanatics are pretty fond of Ivy. Hopefully they check out her mini and really help boost its sales.
Among the Rogues, she is definitely the most powerful in terms of powers. Which is why I always find it dumb that she gets dispatched so easily when up against members of the Bat-Family. Meh, I think she is too appealing and rich a character to be reduced to just being a villain who sporadically appears in Bat-books anyway. She is Magneto-level in terms of complexities so I definitely feel she can carry her own solo just like him, provided she gets the right creative team (thankfully by the looks of it, Chu and Mann seem to fit the bill so far).