I think "polished" UX usually requires a dumbed down interface and is otherwise exceedingly difficult for necessarily complex workflows such as broadcasting.

If your product isn't quite opinionated on the one right way to do things (and only a specific kind of thing) you can create a really shiny UX. If your product needs to be many things to many kinds of people, stuff ends up a bit messy but only to the detriment to extreme beginners.