I have reccied the "direct" line from clough head to great dodd a few times, losing a couple of hundred feet but a lot shorter. Useful on a hot day to get water if you don't want to carry much. It is no faster or slower, the times very similar within a minute. But I am guessing that the climb up steep grass uses more energy, which may all add up to knackeredness on a long day.
I did find an interesting ACW trick on an out and back leg 2 last week: which is back track from Raise south west around 100 m ( would have to check exact bearing) and from there it is a really good grassy run down to sticks pass on good grass.. Much faster than the direct route. Saved 2-3 minutes on the ACW schedule. No use to you now of course!!