I've never walked away from a course dissapointed that it didn't have a roller/overhand hole on it. They certainly are valuable shots (especially for recovery shots) but aren't IMO necessary for a well-rounded course. Atleast in this area; most fairways that calls for a roller is either littered with sticks/branches or roots that create a increased amount of "luck" on rollers.
For my money; a variety of shot shapes (with both clockwise and anti-clockwise fade control) at varying distances with elevation change is the mix I want.
Ah, but the question isn't about a well-rounded course....it's a course that forces you to develop a complete game.