Since spring 2009, the LF51/Kempenroute cyclist route (Antwerpen-Eindhoven) was updated, at least the NL part.

The major difference is that fully uses the cyclist
network, so you can just use the network map. Therefore 'Kempenroute (2009)'
consists only of smaller network routes.

The only issue is the old LF51: it is used in books, not only the LF51 routebook (the old edition will probably be sold for several years, reprints are very rare) and other books depend on (parts) of this route.
'Van Amsterdam naar Barcelona', a trip from Eindhoven to Girona (??),
will get you lost within 10km
Therefore I will copy/paste as much as possible, and only rename the old version when I finished building the new one.

Which comes to a question: does anybody know how to copy paste parts of a relation/route?