Deviating from the script

I recently dusted off a hard drive to finally finish up an old side project. It's a fiction short, and after a few years of really focusing on documentary and non-fiction, it's been interesting to revisit it. What I've been struck by most looking over the rough cut, is how much I'm now planning to cut out – extraneous lines of dialogue, shots that I find too revealing (when imagination would be more powerful), and maybe even a whole scene or two. I always knew this is a normal part of editing fiction, but learning from the "writing" process that is so commonly done in the editing room for a doc is coming in very handy in identifying where to deviate from the original script.