I was thinking that making a resource pack was kind of hard. So I thought that Mojang could possibly implement a feature where you can make your own resource pack in the game with a variety of colors. It would have options to set the opacity, saturation, and other things to modify your textures. To modify the sound you would just plug in a microphone and record it or put in a mp3 from the internet. There would also be a folder in the Minecraft directory where you can take the resource pack and put it on a website or something.