To answer your question directly, no I don't think so (perhaps some updated theories, but nothing concrete).

But the article does cover more than just the incident, I found the whole thing fairly interesting.

Beyond the passing knowledge I have from growing up in Chicago-land around the time and the Wikipedia article on the subject, I thought it contextualized the FCC policies around the time of the incident and how the hack worked (from a high level). It also pointed out other signal intrusions from the same period and the FCC/FBI's methods to track down the perpetrators.

I had read all about the incident before, but had never seen the FBI report. So there is some stuff that you may not have seen.

If you haven't read the reddit thread from within the last year then it certainly has a great amount of new information. In fact, I thought the reddit theory was a more compelling story than this article