If you wanna know why fans are pissed at this anime, it's because they changed a lot of things. When making a remake of something very popular and well loved, some, or I dare say, most, people expect the most important parts of said show/movie/book to be included in said remake. Some parts aren't meant to be changed, and when you change/don't include them, tons of people WILL get pissed off at you. They may seem like minor changes to you, but others beg to differ.
Out of curiosity, have you EVER thought to yourself, "Y'know, I wish they remade the Powerpuff Girls into a Shoujo anime!" If you have, then their is seriously something wrong with you. No honestly, you should see someone right away...
My point: Haters, ranting and swearing about how much this anime sucks won't accomplish anything. You can't force others to hate something they like. And don't hate others for liking this change as well. Some of it's kinda cute. Fans, if you think the haters have no good reason for hating this, you're SO wrong. No matter how much you enjoy it, this'll never come even close to the original. By opinion and factual ratings I'm afraid. And don't be so SUPPORTIVE of this anime either, it's just a pointless remake.
Above all, if you love a remake and hate the original and all who disagree, or you love the original and hate a remake and all who disagree, for any topic, whether you show it off or not, you're wasting your time and life. Scratch it off, and let it go, or become another pathetic loser forever. If I offended you, I apologize...kind of.