Personally, I prefer -mr.
...but if the namespace police won't permit that on cpan, it wouldn't matter, because I would simply rename it for local use.
Did you give any thought to depth first -v- breadth first?
It probably wouldn't make any difference at all for most uses. In fact, now I've typed that, the only time it might make a difference is if you were using it to delete files and wanted to also delete the subir if it ended up empty. But that's probably better done with other tools anyway.
The other thought that crossed my mind was I wonder how it would play with the Getopt::short/middle/long/very-very-very-long* modules? I'm not sure when they do there processing of @ARGV? But if the do their processing at BEGIN time, then maybe yours should be done at CHECK time?
Examine what is said, not who speaks."Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail