Just putting my 2¢ in.
This sorta reminds me of several debates I've come across. The case of Graphical Quality v. Gameplay Quality.
I think a good argument would be somewhere along the lines of why there are no more adventure games. You know, like the classic LucasArts or Sierra games. Now compare those to a majority of "adventure" games that are on the market nowadays. I guess I can say that I've just about lost faith that gaming would ever be as good as it used to be. Then again, Toady, thus far, has done a good job in keeping my attention, along with many others like me.
What's the difference? It's not over-simplified nor overly-complex; it leaves much to be improved and to the imagination; It's amazingly more open-ended than most "sandbox" games. In an odd way, this is almost literally a sandbox, especially if you embarked in a desert.
I guess, what I'm saying is that, as oddball the UI may be, it gets to the freaking point, and does exactly what it should. And like most people say, any bugs are just new "features" stumbled across in the game.
I mean no offense, but anyone else that's complaining is just not experienced enough in this style/quality of gaming to understand. Don't depend too much on your eyes to see, use your feelings. The UI, like the graphics, is like Matrix-code, after you put some time in, you'll no longer see it, and it becomes second-nature to you.
And my argument is spent. Carry on.