Once games moved into 3D the analog stick was born from necessity. It was no longer acceptable to have an on or off button for movement. The only place where a D-Pad is significant is fighting games. Microsoft is pushing Killer Instinct and being a fighting game you have 3 choices. Use a fight stick of some type which is ideal, use the analog which IMO is last resort, or use the dpad which should be ok. However what I am hearing is the D-Pad on the XB1 is less than ideal for fighters. It's better than the 360 but doesn't seem to be what is needed. Most games today don't use the dpad at all, or only as you mentioned for secondary actions.