The problem is not that Donkey Kong was made--we do need more fur-based games, after all--it's simply that there isn't much else that will draw in new customers, as most DK fans already jumped for on board for Mario. In that regard, Donkey Kong is blameless. It's just a matter of timing. Donkey Kong would have been fine if more variety had already graced the Wii U. As it stands, it highlights the root of Nintendo's problems, which is too narrow a focus in terms of genre and aesthetics.
So, I think dwelling on Donkey Kong is ignoring the real issue. Things didn't turn out as Nintendo envisioned, which left a quality game hanging out to dry. The real focus should be on what Nintendo is going to do about increasing the scope of catalog, not on cutting out what they already do well. They don't need less DK, they need more other stuff.
