i agree, i in fact did a all courses run yesterday and i said that 1 lap was dumb, i dont think difficulties would make much of a difference but you definitely could do it. However, i would like a 3 lap version of all courses for sure, and maybe a 2 lap
Hard difficulty actually changes up most of the courses. I plan to add an all courses hard category because of this actually. The all courses category requires that you complete all 20 levels plus Bermuda Unlocked after beating Hard Career) . I would say each course needs to be completed in arcade mode, circuit, and then go through each level with 3 laps per race. So its basically normal career with Bermuda added. All course hard will be basically the same thing, but with the reworked tracks. I plan to add the Category today. Hopefully sometime i can run these categories.