I would absolutely not call Rust a simpler Swift. Swift doesn't have and ownership/borrowing system, explicit lifetime for objects, much more expressive (and therefore complex) macro support...

I get that there's a tradeoff. Rust requires you to be way more explicit about what you're intending upfront and that can, in the long term, lead to simpler code -- but there's no dimension (depth-wise or breadth-wise) that I'd call Rust simpler.