This might work for situations where one of our provinces borders one hostile province... but what about more complex situations (which are quite common in actual play)?I don't get your logic here, please clarify.
I've always thought that when my division in this province and the enemy division in the next province are sitting opposed to eachother, they are both in the edges of their provinces, with a no-mans-land of 1-5km in between them. Perfectly possible to bombard the enemy front line without attacking, =attempting to push the enemy division out of the province he controls. It doesn't mean that the provinces need to be small enough for artillery in the next province to cover it from North to South.
Suppose an enemy province is adjacent to three of our provinces. Supposedly, the enemy forces are deployed in three groups, one facing each hostile province-border. Should EACH one of our stacks (in three seperate provinces) all be allowed to ART-bombard the entire enemy front-line force (not including reserves), even though two-thirds of them are several dozen (or a hundred) km away, facing a different province-border?