Custom panoramas or still images for loading screens

I love the new screenshot feature on Minecraft PE, but something that I would love to see is the ability to use those photos taken in game as you loading screens, this would make waiting for your worlds to load or a different dimension to generate so much more enjoyable rather than just seeing the some default loading screens all the time. Another thing that I would much appreciate is an option for a dark mode, I would love the ability to change the colour of things like the loading panels and the inventory backgrounds. Another thing I would be thrilled to see on pocket edition is a faster way to change the camera from first person to something else, this would make it much easier because you wouldn’t need to go all the way into video settings every time, last request, please add more mob variation, I would kill to see a highland cow! Thanks Mojang keep up the awesome work! ;D