I've found it to be easy to work personally, if you want long names of functions in your code if it helps you should. Common libraries might not have long names for functions, but you'll find the same thing for the most part if you look at the API of collections in various languages for example.

Oddly now I find it really legible compared to other languages, you can still make things obtuse if you really want to, but the flow seems so much clearer.

I would say compared to Java (as you mentioned it) there's much less separation because things invariably gravitate towards big balls of mud containing lots of state. But in Haskell the function you're looking at is only tied to the functions and data types it uses, no more, no less.