You pretty much just listed out our current backlog. Great minds think a like! For the first item though, we plan to implement “tags”. The sub directory format actually causes links to be siloed under a specific subname, so if 2 links should exist across 2 sub directories, it would need to be duplicated. With tags, you can tag the link and aggregate the links with the tag.

For the 4th point about someone using another link redirect, that's an interesting use case. Should we change the link to the underlying link, removing the intermediate links, or treat it as its own links? I can see a user doing this to try and create their own analytics, or maybe they found it easier to copy an already shortened link. That's a great suggestion, and we'll look into that use case.