Ranged is too dominating. You can line up rows of ranged and focus fire. When they get +1 range promotions, you can have them two rows deep. Artillery is even more powerful. This makes combat a kind of fight to see who can get the best positioned ranged units, which leads to boring play. I think all ranged units should get a large penalty to attack if adjacent to an enemy non-ranged unit. This would incentivize people to advance their non-ranged units, and remove the domination that ranged currently has. It also makes sense in terms of historical accuracy, I think -- archers, artillery, etc..., are for attacking long range, but artillery pieces aren't going to be very useful with infantry right up on the piece. Further, the operators of the artillery are distracted by the need for self-defense. With this, the penalty to attack vs units introduced in G&K could also be removed or reduced. This also makes sense -- artillery is just as good at destroying infantry as it would be at bombarding cities -- just not infantry which are right up close.