The problem with the code you talk about is that they use libraries that are intended to create a new DSL, instead of fuse into the language itself. Apart from

The problem with the code you talk about is that they use libraries that are intended to create a new DSL, instead of fuse into the language itself. Apart from that, there isn't really much problem with Haskell's operators. There are only few in standard library addressing applicative and monad, and the de facto standard Lens library.