I think you have a point, but would prefer to see this dealt with in a longer, properly researched article. If you remove some optional newlines, this amounts to two paragraphs with no link.
It sounds a bit like a preference for a particular style of writing (longer articles), but I get the impression you're concerned with the more general idea of quality, which is more flexible. That would indicate this article would have benefited from some polishing.
Maybe a FAQ of sorts for first story submissions would be in order... oh, wait, there is already one in the FAQ and it's not that bad!
Really, although I share with you the concern over the signal-to-noise ratio, I don't think this advice is sufficient.
This article could be improved either by making it more concise, or by exploring the subject further. Unfortunately, the first option would render "Please read the FAQ/Help section before posting", which is hardly an article... where the second would render an FAQ/Help section, which is already present and deals with this.
If something actually needs to be done, the problem has to be identified. The source of the problem, IMHO, seems to be confusion about what is expected in each section. Particularly about what is an article (almost all sections), and what is an MLP.
Two paragraphs and a link, I would agree, is not an article... it's an MLP (unless the two paragraphs are brilliant and concise, which is possible). Let's rename this "a link and an introduction", so as to not confuse length of exposition with quality of exposition.
On the other hand, the MLP section seems to receive a lot of posts that consists of the link, with no real meat at all. What is missing is what you call "the angle", the GOOD introduction that explains why you should care about the link.
Now these are important points if and only if the noise in the system is composed mostly of MLPs being posted as articles, and bare links posted as MLPs.
This seems to be true (IMHO again), but really, what can Kuro5hin do about it? This is dealt with in the FAQ/Help. It clearly states what an MLP is, what an article is, gives good neutral recommendations on how to write a good article... people are either not reading them in the first place or disregarding them.
Should it be made more obvious? I don't know. I don't think so, but if you think adding a new question to the FAQ will help, by all means, propose a "What is the difference between MLP and an article?" question. But it will not help unless people read it.
It's a fact of life that people don't read the manuals, help files, FAQs if they can avoid it. We rely on common sense for most of our activities, and Kuro5hin is not intimidating enough to force the typical reader to look for the manual on how to post things.
This is a Good Thing. Most people have enough common sense to make a contribution without doing really terrible things.
There's nothing Kuro5hin can do to solve that that wouldn't be worse than the problem. I haven't seen that many awful articles get through the queues.
Freedom is the freedom to say 2+2=4, everything else follows...