Non-uniform scale should be the exception rather than the rule

[andybak]

In nearly all common cases it's not what the user wants.

It only makes sense for the simplest shapes. Most shapes becomes distorted. Naive users will use it without thinking and create ugly things. More thoughtful users will be constantly fighting the defaults.

I suggest the scale tool should have a non-uniform mode but the example scenes and default behaviour should be to only allow uniform scaling. Primitives where it makes sense to use non-uniform scaling (spheres, cubes and other simple shapes) should probably have a separate parameter to control their aspect ratio. (although this opens a can of worms in other areas - non-uniform cuboids have stretched textures whereas the user probably intended them to tile)