My personal issues are with changes that can't ignore i.e. The combat update. Minecraft's theme is constantly shifting and because of that always feels wrong.
I don't think I can bring myself to use 1.13 when it comes out because of a full on ascetic change. While it will harmonise the textures into one style it breaks the iconic style that was before it and I don't want to play a game that looks different to everyone else's especially if I want to make something that other people want to use.
People will always have a worse reaction to changes in the game and additions will be more mixed reaction. Changing textures is just that, a change it doesn't add anything new to the game and implies something is taken away in exchange. You could always install a texture pack for the purpose that this fills (They knew the textures where quite bad) and is just asking for people to get upset.