I don't think that's a problem: avoiding features or fiddling with syntax in order to make the code more accessible to people who are not familiar with the language or its libraries isn't going to gain much in the long run. Languages and libraries should be geared towards long-term developer happiness, rather than a shallow learning curve.
Anyway, I know as close as possible to nothing about Rust. It seems blindingly obvious to me that `2.days()` returns some kind of duration, and `2.days().from_now()` returns some kind of time. So I've looked at the code, and that appears to be correct - `2.days()` returns a `TimeChange`, and `2.days().from_now()` returns a Time. I can't think of any other reasonable interpretation.
