Changes to Y Level Coordinates

TL;DR - Y cords should be shifted up by 64 blocks This isn't a very must have implement, but I feel it would just make sense. With the amount of new world we're getting and amount of new players, I feel like it would be a small/easy change (I don't have evidence and could be completely wrong). Having anything below Minecraft's sea level (currently Y=64) would make it really feel like you're actually descending, instead of changing it so cords go from 0-384. The way the cords are now with the new update it'd be a shame to keep them at (-64)-320, simply do to the fact that it's slightly confusing and makes no sense, to players across all levels of experience and skill. I'm sure there are other reasons but you get the gist of it.