The arrows are easy enough for me. Middle finger hits the - or =, pinky hits shift and index finger hits >. It's drastically less finger-work than f-u-n-c-t-i-o-n-shift-(-)-space-{-}. The only languages I can think of off the top of my head with easier syntax for anonymous functions are Scala (a pair of parentheses is literally all you need) and Clojure (with its #() syntax), which both seem to have put a lot of effort into making them easy.

In particular, Ruby and Python both require more typing. At their most concise:

  Ruby:   -> {}

  Python: lambda:

You may be stuck with your IDE:

  JavaScript: fu<tab><shift-)>
    function(){
      <cursor>
    }

  Python: la<tab>:

The remaining characters should be filled in by most modern IDE / IDE plugins.

Those are both still more work than ->, and you could make a shortcut for the arrow as well if it's so difficult. Anyway, my point is that I don't see why the arrow should give anyone with a normal keyboard layout an inordinate amount of trouble compared to similar constructs in other languages.

Not easy to type? What kind of a weird alien keyboard do you have? :-)