If we don’t say what we think the quality of trails will not improve. If caches in a series are repetitive they become boring!
The fact that letter boxers are prepared to contribute to a charity to buy the route does not necessarily make it a good geocaching route. The two hobbies are quite different.
Also why is there a need to archive after six months? I understand that when selling the route instructions one wants to be able to clear the area so that another route can be placed and sold. However, we don’t sell our cache descriptions. There are many square miles of moor without caches that could be used for additional routes. Is the cache owner hoping to record a high number of hides without the resultant maintenance load? Or perhaps is it that the distinction of being able to say “I did the earlier series” important to some people?