United Kingdoms

Just one additional attack.

It significantly improves the chances of hitting. And this is a rather important factor in the expansions.

They aren't needed for the crossbowman.

The crossbow doesn't deal the highest damage; it's comparable to the damage of a bow only when armor comes into play. It takes two hits to take down an average person. But a ranger (even with 5 Perception), using a Bow III and Shamanism (Fire Spirit), starts dealing 45-67 (+18-26 fire damage) per shot, compared to a single shot from a crossbowman dealing 40-60 (+16-24 fire damage). Against an opponent with 30 defense, this will be 33-63 x 2 (66-126) damage versus 56-84. And with each new point of Perception, the gap will only increase.