The transformations are saved and stored as a transform matrix [xx, xy, yx, yy, x, y] and when ever there is a rotate or skew transform its impossible to revert the matrix back to readable, understandable and simple values like position, scale, rotation,….

This can help to transform components: Use the transformation pane in the inspector, but be sure you enabled “Transform Components” in the transform pane option menu.

or with code:

g = CurrentGlyph()

for component in g.components:
    center = (100, 100)
    component.rotate(50, center)
    # component.transalte((100, 100))
    # component.scaleTransformation((.3, .3), center)

It’s disabled by default cause transforming multiple glyphs can end up with a double transformation on glyphs with components, one time by the referenced glyph and other one by transforming the component itself.