I've noticed the same thing. Likewise for gladiator the equipping of a shield is not reflected in the Attributes screen to show how the shield affects the player. Although at the moment I don't really think this is a big problem since stats don't really seem to have much of a substantial impact on the player yet anyway. Once they redo all the formulas (probably 1.19) to better factor in stat increases, I think we'll see an updated Attributes panel.