From my POV - the exam needs a little editing. I found some of the questions misleading, and certainly from a Canadian perspective - slightly unfair to the non-US inspectors. Some of the wording slightly misleading or in a couple of cases poorly worded. Hopefully, this may be Canadianized in the near future.
The other area of concern raised is certainly there are new areas expanding - but radon is an environmental issue. I also found the number of questions dealing with radon and WDO a little much considering - radon and WDO are not part of the SOP.
Typically my experience is leave those or refer those to specialist. That is not take away the need for “general” knowledge in those areas.
Overall the exam setup itself is extremely well done from the IT perspective.