Hiya Chris. Design. Branding. UX. UI. What fascinating subjects you bring up!

How many UNA themes are out there? I'm satisfied with Protean for my needs. It seems quite customizable to me.

One size will never fit all. If a site is for funeral directors it would not resemble one for race car drivers. And if there is no useful content - it will make little difference. Content will always be king. Most users will ignore bad presentation to get to the good content. That said, the medium must fit the message. So we, of course, should seek the best possible presentation.

As for site navigation, it should be simple. This is where page breadcrumbs can help. A good rule for site navigation is: Don't make clients wonder. If they are wondering where they are or what to do next, we are wasting their time.

UNA devs are amazing. UNA visionaries, likewise. I am confident things will keep improving. And that they will consider every suggestion for improvement.