As a thought experiment, an interesting alternative would be to provide the desired router as a suffix.
You could hack around how sigils allow lists of characters at the end, to support things like Regex modifier flags such as ~r/(^(?<line>.*?)$/m for multi-line regexes.
Sadly, ~p"my_path"MyApp.Router would not work because of how the . gets parsed; these modifiers only accept ASCII letters and digits. So we’re back to doing something like configuring an alias in your Router, but with even nastier metaprogramming to implement:
use Phoenix.VerifiedRoutes,
endpoint: MyApp.Endpoint,
router: MyApp.Router,
statics: MyApp.statics,
sigil_specifier: "myapprouter"
~p"/my_path"myapprouter
which is frankly worse.
