In the absence of any other charity organisation having a go maintaining access for all, I think they're doing a great job of it. It's a simple case of identifying historical public footpaths on the early OS maps and reinstating them. A presently shown public path with an obstruction is another matter.
Focused on the task, I was amazed how many unmarked, still official footpaths there are everywhere. eg. We all know of routes where on the latest maps the red/green dotted footpath line just stop at nothing. Cross checking the early surveys, you could see the paths carried on to useful destination. The history of how they became lost in the first place would be interesting to know.
Perhaps they look at bridleways similarly. I'll ask. I've not heard of any shouting by any equine or mountain biking groups having a go. And as for the 4x4 crowds, you wouldn't expect Ramblers to worry too much about them.:lol: