My naive guess, without knowing exactly what the sticking point is for you, is that Orion could do a better job on the modules page [1] explaining exactly what each module is for and when to use it.
Right now, I'd say the state of the library, rather than its intention, is that it's extremely usable for people who pretty much know what they want, and fairly hard for the average developer to misuse.
But I believe the author would be very interested in something that makes the library cater better to people who don't want to learn crypto, but just want to get things done using it.
[1] https://docs.rs/orion/0.15.5/orion/index.html#modules
EDIT: After some thought, I think I would say that the API for Orion is maybe an 8/10 for beginners, but the documentation is still at maybe 5/10 or 6/10 for beginners. Someone who is familiar with crypto would probably be able to look at the documentation and know what they're doing, but for someone unfamiliar with crypto, I can see how there isn't a ton in the way of explanation of the various primitives. That would be a good area for improvement for the library.