they won't end up like that unless it's the only option - and sometimes it is the only option, e.g. over peaty moorland. As BWD says the chaps who are planning the works do actually have an appreciation of what works and what doesn;t, some of them are involved with RideThePeak
They tried to do something similar with the descent from Coldwell Clough down to the campsite in Hayfield and (for whatever reason) Nick Craig got involved with it. They said they were going to flatten/gravel the lot of it to "make it safer for cyclists" and Nick told them that was positively the last thing that needed doing since that makes it MORE dangerous. higher speeds and less traction = more accidents.
I don;t remember seing Nick there ever, but I was involved in that bit, and I did tell them that flattening it and gravelling it would be a bad idea. They then flattened it and gravelled it and once a few people had been taken to hospital from failing to make the sharp bend and hitting a stone wall flat out, they rebuilt the trail to route bicycles down the technical bit we'd originally pointed out 
