Eh, the only real backlash they've had was some set pictures of Starfire, which we still don't have any context for. Robin's costume got approval, Hawk and Dove's got approval, and the general perception of the show is as a more comic book friendly series than Inhumans (we're getting Doom Patrol, for goodness sake!).
Starfire, if that is her final look, may very well be a full fledged misfire in design, but Inhumans was fighting an uphill battle from its premise alone, and only got aggravated by the attempt to "de-comic" the aesthetic of the characters.