One thing that would be helpful for those looking to write scripts is to use crates which provide a higher level API. So for example, the text-io crate wraps up the lower-level standard library interface to make it easier to use, though it gives you much less control over errors.

Due to Rust's low-level nature, we've focused on the low-level stuff first: the higher-level APIs can then be built on top. I think this kind of thing would be more helpful to you than actual language improvements in many cases.