Take a look at OCaml, or any ML variant language (aside from Rust, which is more C++ than ML in my opinion anyway) for that matter, for a static typed language with a good implementation of generic types.
I think you're comparing Rust to a language with ad-hoc polymorphism like C++ (where you pay for the somewhat simpler signatures with confusing template instantiation errors), and I'm very glad we didn't follow the C++ route. Rust's generics are very similar to those of Haskell.
The only major generics-related issue that is getting some significant thought is the ability to have the automatically derive the return type on top-level functions, which is not something that is common in other statically typed languages (only C++ and those with whole program type inference, which has its own set of drawbacks).
