One could make that argument (and I did).
However, it’s worth noting that if the glTF importer actually brought in the structure of the glTF, instead of flattening it out, the bug in the vtkAssembly would’ve been resolved some time ago.
For the record, this definitely impacts this other issue. Using an assembly to handle the rotations is going to cause problems here.
So, for now, I’ll have to work around vtkAssembly, it appears.