The reason most of us use Moho is to allow us to focus more on animation and less on drawing. The problem that I have always had with Moho is that unless you only want to animate in one 2d plane, you still need to do a lot of drawing. The purpose of 3d in Moho to make animating more intuitive and reduce the need for drawing.
Actual 3d applications do make animation easier in a way, but by the time you get to the actual animation, you've already spent a WHOLE lot of time modeling, rigging, texturing etc. The workflow of a true 3d package is time consuming (but quite often worth it

).
If Moho had a bit more 3d functionality, it could give us the best of both worlds. 3d in Moho would be very different from a dedicated 3d app because:
- Moho allows us to use very simple models, but still have them look good.
We don't have to make everything in 3d. We can save a lot of work by just drawing a lot of the stuff we need, and it will fit right in with everything else. You can do that with a 3d apps and a compositiing app, but Moho has excellent tools already built-in.
There is no need to bother with complex non-photorealistic renderers to get the toon look--Moho has it already.
With Z-Bones, character rigging would be simple. No weight mapping, no morph targets, no worring about smooth deformations of geometry. Just bring in a segmented character and assign each body part to a different bone. The seams between the segments won't be noticable, since there is no lighting and the characters will be fairly simple.
Certain parts of characters can be 2d, and they can be animated right in Moho. Although most 3d apps allow you to have animated textures, you can not animate the 2d textures right in the program. This means you would need to animate say...a mouth in Moho, render it, bring it into the 3d app, texture it onto the model, sync it up. If you're not happy with the animation, you have to repeat the process. Moho has a clear advantage here.
I don't know about everyone else, but stuff like Tutorial 6.8 with the 3d head makes me pretty excited. The current 3d functionality works fairly well for props and backgrounds, but Moho still needs more tools for animating characters in 3d.
Features I'd like to see:
Z Bones: With some work, the system Moho has for 2D bone manipulation would work fairly well in 3d--especially if we could use scripts to create set-driven relationships.
Texture map vector layers onto 3d Objects: Positiong vector layer "sprites" like we do now is fairly tedious. Being able to texture 3d objects with 2d layers would make things like animating faces much easier.
3d Manipulators: These thingy majiggers are a must for positioning and rotating objects in 3d. They allow us to use the 3d view almost exclusively instead of the top, left, and side views. If you don't know what I mean by manipulators, go here:
http://www.blender3d.org/cms/3D_Transfo ... 574.0.html