A late follow-up on the linking responder subject: Sure I'm heavily Alcugs-biased, however the fundamental problem is the same on UU: linking rule and age title must me consistent for an age, and spawn point title must be consistent for a spawn point. The actual consistent content might be different depending on the server software and the admin's wishes, but it has to be always the same.
Btw, that "extended" central linking file to link to MOUL, Myst V, Fan, ... ages exists, it's the xLinkMgr contained in the Offline KI. It just has no interface to be plugged into an age, but using this file, one could have a linking python file mod taking only the age filename and the spawn point name, and doing the rest correctly, no matter where you link to (or it would show an error in case the link is invalid). However, this would make the age depend on the Offline KI, which is not available for UU.
Oh, and you can change the instance settings on Alcugs servers, as D'Lanor said. It's actually quite crude: There simply is a list of instanced ages in the config file. The rest is global. Unfortunately, it's not possible to use the actual linking rule supplied by the age, because Cyan broke that completely in POTS. It's wrong all over the place.
Now spawn points are a different story. If you get those wrong you will break the Relto bookshelves and Nexus of your users. Their linking panels may never show up if they use a link from a fan age before getting their link the "official" way. Unfortunately writers keep linking to Cyan's ages no matter what we say. I think this is a lost cause diafero.

Indeed it is, which is exactly the reason why I prefer Python linking: Such problems can be detected and fixed automatically then. This is much harder for a prp link.