Ditchling isn't really so bad, although I can understand why a novice might find it difficult coming at the end of a long ride. For more regular cyclists, the biggest problem is the repeated changes in gradient, it's difficult to get a good rhythm going.
A useful tip for those going in the opposite direction is to wait until just before the next car comes before starting your descent. Trust me, you'll be able to go a good deal quicker down all the little drop-offs and bends than most drivers. Following a car is a very frustrating and boring experience, I know, I've tried it a couple of times, the gradient is sufficient to overtake, but the bends make it too dangerous.