Seems that I have to read Müller, maybe it is available on google - Steve????
As to Decker, or Müller, maybe they see the artillery only by the eyes of interests into artillery, artillery tactics or higher tactics (whatever that means) - are in close connection to all other tactics on the battle field.
In my opinion, in the 7 YW battalion guns were quite aggressivly and offensivly used (at least by the Prussians - and for that reason they lost so many guns and for that reason Frederick could not create a system like Liechtenstein - and was better off to be burdened with la Valliere).
Of course this system could have been improved by giving professional gunners to those guns - instead of trained infantrymen.
Concentration of more than one batteries are found in other armies than the French as well in the Napoleonic time.
Creating those big mass of guns caused considerable problems - like Napoleon placed at the Battle of Borodino a lot of his guns too far away to be used efficiantly against the Russians.
But what again is an offensive role of guns, just massing batteries which concentrate their fire power on a designated tactical aim on the battle - field?
Or is it moblie guns - accompanying infantry while attacking or leading an infantry attack by their fire power?