I think The UK riviera line from Exmouth to Paignton would be a good route to add to TSW, good traction choices and a lot of breathtaking scenery along the way. Traction included could be Class 153 Class 150 Class 143 Class 158
Exmouth to Paignton will be a lot better than Exeter to Paignton and Dawlish would look fantastic in this Sim