Nice to hear from you ComradeP.
There will always be anomalies in a system like Panzer Campaigns that is setup to handle conflicts ranging from the desert to the dead of winter, airborne landings etc.
These as you point out become more pronounced when you play some of the larger scenarios that have 'quiet' & 'active' sectors.
Now that said, a lot of what need to be taken into consideration is what is both sides trying to achieve?
I am in the middle of playing the Fall Kreml - Full effort Northern campaign against a number of others here at the blitz. I'm on the Soviet team and I can tell you the last thing I am thinking of doing is plinking away at Germans in quiet sectors
Have a look at this jump map. It's on turn 23 and there are
four major breakthroughs on the front line and the Germans are attempting to nip off the Rzhev bulge to free up further forces to go to Moscow as well. You'll also note they have pulled out of visual range in many parts of the front and that has not only reduced their casualties but also caused significant fog of war issues for the Soviets.
The Soviets have limited rocket and heavy mortar units and if they're able to move them need them somewhere closer to these breakthrough zones. If they leave the volume of artillery you're talking about somewhere inconsequential then the Axis player can be more confident that he will crack the Soviet lines elsewhere wide open.
In answer to your other comment. The design teams have discussed limiting artillery into a hex, but found we were running into issues on defining upper limits etc. You have to be careful or Divisional or Corp guns can't support the appropriate entities. What I can say is there is a limit in the more tactical Panzer Battles.
So in summary, if the Soviet player has the spare guns to shoot you up as the German in Fall Kreml ensure you make him pay with your first breakthrough as he will be found wanting very quickly in that active sector. The Soviet really can not afford to be lackadaisical with his artillery units as they are the only units other then their T-34/KV-1's that can truly hurt the German.
David