I'd like to see language designers make function calls happen in the order you read them.

For example, in most languages you have a notation like f(g(h(x))) which calls the functions in the exact opposite order of reading which is unnecessarily confusing.

You would probably enjoy the UFCS https://en.wikipedia.org/wiki/Uniform_function_call_syntax of Nim, D, etc. Basically `h.g.f(x)` or in Nim you can drop the parens and say `h.g.f x` { but it may not scale past a single argument }. This tends to be only "an option" - more on the "allow/enable" side than the "force them" to do it side, though.