The minecraft of xbox is actually a lot more complciated then the minecraft one. So that is the reason it is harder to update. Plus, they are adding some other feattures that the PC miencraft doesnt have. Like they have an eating animation on the xbox. Your arm moves up to your mouth to eat food.
Leveling up takes a lot of time. I think the fastest way is posting stuff or comments on forums, servers, mods, etc. It may not give you a lot, but it does eventually add up.
