Let's see here...
Green hair? Check. White face? Check. Red lips? Check. Purple suit? Check. You are equating a change made to his origin to a major change in his appearance. I am well aware of the perma-white argument. But make up or no, his face is still white, his lips are still red, and his hair is still green. Your ideas for the Riddler are not comparable to the changes made to the Joker. Not even close. Noone is going to look at Heath Ledger and mistake him for someone else. But I guarantee if you show a picture of a guy with long hair, a business suit, a cane, and John Lennon glasses, and ask him who he is not one single person is going to say that is the Riddler.
And I have to ask, if the suit being green or not is far from a controversy, why change it? It's the most identifiable thing about the Riddler's wardrobe. You are associating two things with his appearance that are more or less irrelevant. Noone that thinks of the Riddler immediately thinks of his cane, or his glasses (which are a relatively new thing too, mind you). They think of his green suit, his question mark tie, and his hat. I just don't get why you would take away the one thing that is automatically identified with the Riddler (the color green) just because you think it makes more sense in Nolan's movies (which it doesn't). I can even understand an argument being made against a question mark tie, or even the hat, but the green suit? Please. There gets to be a point where this hyper-reality argument just flat out makes Batman, and his villains boring, and drains away anything that makes the character interesting. And it shows me that some people have absolutely no understanding whatsoever what Nolan means when he says his Batman exists in a realistic universe. Just because his universe is a little more realistic doesn't mean he likes to take away everything about the aesthetics of a certain character that makes them interesting. The characters still look and act like the characters they were intended to be. Riddler is easily the second easiest character (behind the Penguin) to adapt to the screen without making major changes to the looks of the character that might be deemed as silly. I mean, all you need to do it give the guy a green suit, a green or purple tie, a black dress shirt, a cane, and a hat and there is the Riddler. If Nolan cant even do that correctly he has no place directing a Batman film. Luckily for us he has more common sense than a few people posting on these boards, and knows how to keep the essence of a character's looks without making them look silly. That is the whole point of his stance on realism. He adapts these characters as closely as possible without making them look silly on the big screen. Please explain to me what is silly about a green suit, because I just don't get it.