A good reason for keeping the claw attack seperate is to allow the monster to be scaled levels without having 'special' handling for the double claw attack.
If I level up the dragon and increase the damage, the double-claw attack automatically scales with the claw attack.
On a related note, I've often seen creatures with these double attacks which have a secondary power if both hit the same target. (A grab for instance)
If I level up the dragon and increase the damage, the double-claw attack automatically scales with the claw attack.

On a related note, I've often seen creatures with these double attacks which have a secondary power if both hit the same target. (A grab for instance)