Big problem with reading a pre-authored route, after you have seen a potential route to walk on a map, it somehow loses it's identity as your own route.
Do the writers of guide books do more than point out the obvious, joining up a set of rights of way into a format that is a circular walk of a set distance or in the case of LDP's 2 destinations to be decided on which direction you are going to walk them. Most LDP's are set out routes, mostly by local authorities, to furnish and market and many seem to be an exercise in covering up the inadequacies of their Access Network. If routes were generated from the terrain, focused on features and measured by their quality of way perhaps we would get a better perspective of that part of our countryside we are not allowed to walk in.
There are, I suspect, many more variables, which could be applied the judgement of quality of routes, if a more critical approach to terrain was applied to judging routes and safety is a very important feature, which owners of property have control over and yet absolutely no responsibility to take into account.