We tend to underestimate the value that a decent UI/UX professional can bring to a software product. Users typically hate changes (change aversion is in the human nature) and will hardly notice any improvements. But try to install an older piece of software, say, Microsoft Word 97 and compare usability to the current version. Don't pick one feature, look at it from a daily usage perspective. I bet you'll find a ton of improvements and think "huh, I had no idea it was so painful to work with Word 97"...