No, I hadn't seen App::perlmv. Thanks for the pointer. It is similar in many ways to the first few iterations of my script; we both have saved routines for ease of re-use, for instance. However, mine has since added a number of utility functions and a separate execution environment for the scriptlets.
That said, there are a couple of good ideas in there that I hadn't considered, and will think about incorporating.
Comment on Re^2: Standalone Script Naming for CPAN
Perhaps you could communicate with that author and between you plan for a clean merge of both, with deprecate of the other? The author might not be interested in maintaining the other one and open to turning it over.
Sometimes the only way forward is a fork, but it is usually worth investigating possibilities for avoiding it.