Please consider trying out some or all of these options and let me know how they fare.
Especially in a longer campaign, archery can become rather too strong leading to the witless bad guys getting mown down Agincourt-style.
If you are concerned about this, make the following adjustments:
Ranged attacks at a distance exceeding 9" do NOT add Combat Skill to the attack roll.
For enemy types without archers, increase the encounter number by +1.
For enemies with archers, if 8+ enemy figures are encountered, increase the archer count by +1 (but do not add additional figures)
Enemy Personalities (knight etc.) receive a 5+ saving throw against missile attacks.