Also, the carved ornamental bits of classical and medieval architecture were mostly designed based on very different aesthetic sensibilities to our appreciation

Also, the carved ornamental bits of classical and medieval architecture were mostly designed based on very different aesthetic sensibilities to our appreciation of how the stone looks after the centuries have worn the paint off... We'd probably consider the original Greek temple decoration in its original state as looking a bit gaudy, and they'd probably consider the undressed stone or white paint of neoclassical architecture of the last couple of centuries to look unfinished.