The lack of serious injuries and media interest are two factors that will likely limit the amount of publicly accessible information regarding the incident. Someone with intimate knowledge of OHS might be able to answer this better, but I wouldn't hold my breath for the kind of reports that surface from US incidents. At the end of the day it has been closed long enough to suggest that it's more than a simple maintenance or procedural issue. That there's likely a design or fabrication issue that has had to be rectified. When it does reopen it will have satisfied the park, their investors, lawyers and insurers, plus S&S and their investors, lawyers and insurers. I'd personally take this implicit tick of approval over a government commissioned report. An in-depth report would be interesting to read, but I suspect it would say exactly what I've said above, along with 50 pages of metallurgy test results.