Will humanoid rigs ever support stretch?

Hi,

I have animations with stretch & since discovering that stretch is not supported with the humanoid rig I have reverted to setting the model & animations as generic. That's been fine as it still uses the new mecanim system, but now I've come to try & mirror an anim in unity & have discovered this isn't possible with the generic rig.

I don't really mind which gets fixed, either humanoid supports squash & stretch or generic supports the mirroring of animations. Does anyone know if either one of these is likely to happen/or even possible in the future? Or if there's a workaround for this issue?

Apologies if this post is in the wrong section, It's my first post & I'm just learning the ways of Unity :)