You can have excellent artillery pieces and ancillary equipment. If the training and docrtine are inferior and the employment of artillery not as effective as it could be, then the artillery arm will be inferior. That is the point of the exercise with the Prussian artillery of the Napoleonic period, pre- or post-Jena. The Prussian artillery organization was inferior to that of the French as was their command and control in combat. Further, their doctrine as it was did not exceed the battery level. There were few outstanding Prussian artillerymen at the general officer level, von Holtzendorf probably being the outstanding example. You don't build an efficient and well-organized artillery arm over night, and the Prussians weren't able to catch up post-1809. They did greatly improve when contrasted to what existed pre-Jena, the other four main belligerents (Russia, Austria, Great Britain, and France) had much superior artillery arms during the period.