"Will the High Peaks Trail be rated X?"
The hand rails may be loaded with deadly bacteria and viruses and buggers. The good news is that if you are vaccinated against everything and taking antibiotics, you might score on a wad of gum stuck to them that still has flavor.
If I were to guess, I would say that the amount of rock displaced to make the High Peaks trail verses climbing bolt holes in Pinnacles is 50,000,000 to 1. To be fair, now that Pinnacles is a National Park, this seams to be equal to the ratio of hikers to climbers. Who knew?