In the select tool, the base point of the scaling transformation (opposite bounding box corner or rotation center with 'Shift') is displayed as soon as you start dragging one of the resize arrows.
c) select tool vs node tool:
After rereading your report it seems I misunderstand your request and this report is about the transformation handles of node tool which don't display the rotation center while resizing nor take a temporarily moved rotation center into account when 'Shift'-dragging a resize handle.
In the select tool, the base point of the scaling transformation (opposite bounding box corner or rotation center with 'Shift') is displayed as soon as you start dragging one of the resize arrows.
c) select tool vs node tool:
After rereading your report it seems I misunderstand your request and this report is about the transformation handles of node tool which don't display the rotation center while resizing nor take a temporarily moved rotation center into account when 'Shift'-dragging a resize handle.
Related report: /bugs.launchpad .net/inkscape/ +bug/590261>
Bug #590261 “[Node tool] Scale/stretch/skew transforms with transform handles don't snap”
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