A) I would suggest that some of the unit attack ranges be modified.
Most units equipped with direct fire guns 75mm or larger should be able to attack at a range of 2 hexes at Half Strength. Combined with this units targeted with this long range direct fire should fire back if they are capable. This would allow for such historical as Matilda’s with there 40mm guns taking damage from 88mm AT guns without being able to respond.
To compensate indirect fire Artillery for this adjustment I would add one to there attack range but reduce there damage to Half Strength if they are firing at maximum range.