I would add that duplication of process is absolutely an issue.
Jurisdiction is another issue. The assessors do their work, and the regulators usually wait until the assessors have done all of their work before starting anything. There could be some concurrent processes where the regulators are doing work in advance to reduce some of those processes, or taking the opportunity to use some of the public processes that are done during assessment to advance the work they need to do with the public.
So some concurrence and less duplication of process would definitely help the situation. It would not change the technical level of the review. The science is there. Industry can deal with the technical issues. The work is just dragged out for administrative purposes.