Now you can schedule a shortcut to run at a specific time. But I don’t think you can say something like, “run this at 00:15 after the hour, every hour, between 7am and 6pm.”
I can imagine how much more powerful Shortcuts could still become if it could schedule more like cron.
Obviously that sort of thing should come, and presumably will come, but incrementally. Gotta walk before you run, and all that.
The simple nerd friendly way of doing that would be for Apple to just let us set cron notation. But I’m confident that won’t ever happen and genuinely hoping they come up with a better interface. Date/Time stuff is always tricky and full of weird edge cases.