The things I've heard the most complaints about for this design are the tattoos and the colour scheme.
Personally- I dig the tattoos. Not just a little bit either. I think they fit with the theme of the show and the character as well. The Joker has some tattoos too- and those ones really don't fit... They look like he sat in a chair, paid a tonne of money to a very skilled artist, and very carefully had words and emotions inked onto his skin... HARLEY'S TATTOOS HOWEVER- look like she was bored one day and went at her thighs with an exacto-blade and some pen ink. They look rough and shitty and really haphazard... Which I would expect of her.
The colours though... WHY did they change those? What did they think they would gain with blue? As a lady who claims pink and blue as her theme colours, it's not like I have anything against these choices, I just don't understand them for Harley. Would it have been that hard to make it black and red instead? Would that have compromised someone's artistic integrity associated with some sequen mini shorts and a "daddy's little whatever" shirt? Please.
I find the overt sexuality of the costume weird. But it's not new for Harley to be hyper sexual. I just will always view her as the little Robert Timm, jumpsuit wearing jester headed psycho.
Ah well! We'll see how she acts shant we?