When it comes to tweaking a walk, a lot of settings will have the same value for the left and right side, but half a stride off (for example, if the "stride" is 30 frames long, the left shin bend will have the same value as the right shin bend, but 15 frames later). So, I'll tweak one side and get it "smooth", then copy and paste to the other side, but offset by 15 frames. Some things still need to be "hand adjusted" on both sides (like the thigh "side to side"), because the sign changes when you move to the other side of the body, but at least I cut down on some of the "grunt work"