The distinction is: "Computer correctly updates game state" vs "player can easily understand what is going on." The point those who know programming are making is that getting to "Computer correctly updates game state" is comparatively easy and quick, so it makes sense to do that, which benefits everyone who can live with the current interface and still enjoy games. Delaying Nocturne until everyone is satisfied with the interface is a loosing game, since that likely means a long haul on interface then Nocturne vs Nocturne quick then a long haul on the interface.
Not everyone who knows programming is making that point, since that also includes me. Again: Implementing Nocturne includes implementing the interface for Nocturne, so separating them is pretty meaningless. Maybe you're trying to say that fixing the basic missing interface features - like visible tokens, a marked place to click to see cards in play/set-aside, and a record of past game logs (just storing the actual text from the end-screen game log and creating an interface to access those) - is more work than implementing all of Nocturne. If so, I think you're wrong.
Like Donald said, Nocturne will not make the unhappy people happy, but no Nocturne will make the happy people unhappy. So there is no question that getting Nocturne released on time in necessary, even if it causes a slight delay in interface improvements.
There's a huge disconnect here between what the vocal minority is saying here and reality. Delaying Nocturne and instead fixing basic functionality and bugs will make certain people unhappier, and others happier. The ones who will be happier are mostly a subset of the majority of people not posting here, and the people who try playing and give up and go away without posting, who instead will stay. I don't know how many new users sign up anymore, but there will be more when Nocturne is released.
Another thing that several people forget: Each expansion is less popular than the last. Dominion is a hugely popular game, but most people - by far - who play it don't have the latest expansion and are not planning to get it. This is very different from the vocal minority here.