Maybe as an enhancement to the permalinks system but it would be great if you could control the routes of links in the backend.
For example I could target any discourse generated link like users, profiles, topics, categories, and do something like:
https://meta.discoruse.org/t/name/id
to
https://meta.discourse.org/customroute/
Here is the feature demonstrated on our board that uses xenforo:
[spoiler]
[/spoiler]
Discuss this on our forum.