I'd counter that I actively don't want those more powerful features. Like, I get why anyone would want them, but right now Mise is "knowable". I can sit down with its doc site and figure out any of its features without building a strong mental model of their underlying implementation. And that also means my coworkers aren't as likely to abuse and twist it into the kinds of things people have used tools like Make for.
I would vastly rather have Mise shell out to Make etc for more complex DAG stuff. Those tools already exist and are good at their own specialties. Mise doesn't need to reinvent everything.
But I do think the new monorepo tasks are very on-brand for it. They don't seem so much as to add deep functionality as to provide a convention for finding and running other Mise files in a repo.