Thanks for the great user report. Currently there is quite a bit of work improving the FBX export and improving the internal ( non visible ) hotkey system ( to allow for hotkeys to easily grow/shrink manual weight painting tools ). After that, there will be another quite lengthy work spent on upgrading the toolchain and some internal bug fixing. Will take a look at your request when there are the cycles.
Discuss issues pertaining to the Creature Animation Editor here.