I agree and possibly would also like to
implement presets of shapes,rotations and scaling (as in the
mask tool).
Rotating
and Scaling will be worked on (but not tomorrow on
Christmas day). An attempt to add presets of
shapes ended as a complete disaster as an attempt to port
Mask presets was a totally different design. Decision was
made to not add shapes because to make a
square/rectangle/triangle and even a circle is trivial
with just 3, 4, or 5 points (for a circle you just make a
box using Line and then switch to Curve) while the
programming time would be days.