Currently in 3D charts, if you have a 'column' chart the z depth is not dynamic, it stays the same default of 100 and never updates with more/less data. This is very different from the how all 2D charts work with the data filling the frame, and how 3D scatter works with the data filling the box. I think it would be more consistent/intuitive if the 3D column chart had this feature built into it, and and force the user to override the dynamic sizing if they don't want it

Here is an example of what I am talking about: http://jsfiddle.net/rhavelka/owyrmc7o/3/