Meh I spend way more time thinking than I do typing nowadays. Honestly, putting more thought into what you are going to do next, instead of just banging away until it works usually alleviates the issues you mention. Experience helps with this also (not saying you are inexperienced, but just that the more experienced I become the easier it is to tackle any problem).

Also these refactor the world type changes aren't very common in my experience. Well thought out code can avoid a lot of it.

I find Haskell incredibly valuable for writing up quick solutions. Notably because I have built up a large library of useful pure functions that I have at my disposal, and they cover a large part of the domains I am working in (ever expanding of course). It really just becomes a matter of writing a bit of glue for the right pure functions.