This has been discussed a lot before, but adding 3D adds a great deal more complexity. Most people can draw a sprite, but how many can do 3D modelling? The maths gets a lot harder too, with things like quaternions instead of a simple angle. IMO combining this complexity with a "simple" event system doesn't make sense, because it's still complicated.
Popup 3D like Classic had in a very limited way is possible, but I'm not sure how useful it really is, plus it would depend on WebGL support in C2 which is not really ubiquitously supported yet.