The record supports the idea that the French artillery was still superior in 1813-1815. French horse artillery distinguished itself at Dresden in 1813. Drouot's large battery destroyed the Prussian/Russian center at Lutzen in 1813 paving the way for a Guard infantry assault that literally had to walk on the dead bodies and pieces of bodies as the dead were so thick on the ground. Drouot did the same thing at Ligny in 1815. Drouot again distinguished himself at Hanau in 1813 after Leipzig with the Guard artillery.
Napoleon carefully rebuilt the French artillery arm after Russia, many of the naval artillerymen being used for the Guard artillery. The French artillery distinguished itself in 1813-1815 by its employment, doctrine, and command and control, something the allied artillery did not have or demonstrate.
The French brought the artillery arm to become the equals of the infantry and cavalry on the battlefield. It was no longer merely a supporting arm and being able to both hold ground and perform the main attack on the battlefield, supported by infantry and not merely supporting the infantry and cavalry. The lessons are clear and none of the allied commanders employed their artillery in that manner.