Jerry,
I have found the housing component does not necessarily impact a good routing. In places like Atlanta, you could build good housing and golf courses all day long. Many good holes run in valleys anyway, and in housing, there is added incentive to put them there to increase surrounding views. In other places, like some areas of Texas, the land is flat enough that the some parcels don't have enough natural features to worry about. Even in areas where there is good land, if the developer provides enough land - over 600 acres, there is usually enough features for good golf and good housing, without too much compromise.
Now, the road network can impact it for reasons noted - road crossings and long walks are introduced to some degree. However, many courses, like Champions in Houston have no road crossings, or one, and it is put in a tunnel to minimize distractions. And housing quality and separation can detract, are hard for most golfers to distinguish as a routing, or non routing feature.
But, as to your basic question, while it is harder to do all the things we like to make a great course in housing, the routing itself doesn't necessarily have to suffer in creating good individual golf holes. It may suffer in the connections and proximity, though.