"I don't agree that LWN should have to interview people on articles like this - maybe a good idea as a followup"
I think this points to a general problem with the technical laypress that goes well beyond the reporting here. The technical laypress lacks well established journalist standards, nor does its readership expect them to apply any. Technical articles tend to blend fact based reporting and editorial content with no effort to distinguish either.
But on to the point about the need for personal interviews. They are important if your goal is to provide a clear summary of events or is meant to be constructive analysis. Any time you plan to "make news" with an interpretation of a set of public record events its a reasonably good idea to talk to as many of the individuals involved. Communications have context and the assumption that you can cobble together snippets of public record communications and paint an approximate picture of reality may not actually be adequate. It's like charting a course through icebergs just by relying on spotting the tips of the icebergs without knowing where the ice is beneath the waterline.
At the very least LWN could give the key individuals in this article like Dag Wieers a free subscription (if they don't already have one) and an opportunity to rebut any editorial content the Corbet put in to fill the gaps they feel was inappropriate.