Option to expand hierachies on horizontal- or vertical axis

When hierarchies are used on both the horizontal- and vertical axis:

The 'expand level' feature is always limited to the vertical axis:

But would it be possible to have an additional menu (after clicking the 'expand level' button) about what axis should be expanded? This is not necessary when there is only a single hierarchy used in either the horizontal- or vertical axis. Then the related axis should be expanded immediately.