If you look at the picture of Bruce Spence's character, he has solid black eyes, so they could have gone that route too.Yeah this live-action depiction of the Grand Inquisitor doesn't even look like the same species. Besides the head shape, he has regular human eyes and human looking teeth. Even doing the eyes like the animated version with yellow irises on black eyeballs would have gone a long way in making him look more alien. There shouldn't be any whites on those eyes!
Kor
It's just weird, I could see not being consistent with the animated versions, since there tends to be some changes made when changing from animation to live action, but they aren't even staying consistent with the live actions versions we've seen.
EW.com has posted a fairly long and in depth article on the series.
So far the picture and the comments in the article all have Haden in the Vader suit, but I find it hard to believe we won't see his face at some point. I find it hard to believe they'd go through the trouble of bringing him back, if we aren't actually going to see his face at some point.