I believe you, many wouldnt!!!
LDWAs are a great way of doing low pressure long runs, without having to carry provisions for the winter. Some really good ones coming up too.
Open to offas probably ranks as the hardest to navigate without route knowledge - when I last did it the "burn out barn" where you take the first turn left was obvious. This time it was well overgrown. I overshot the turn and went a mile out of the way!!!
Most dont have as many stiles, twists and turns! So If you enjoyed that swiss T ... you will enjoy them all.
Pendles shadow this w/e is another good route.
Out of curiosity...what time did you get to the car park at the foot of moel famau?