All CRI's in future will have to revalidate by test, without looking it up I think its the same process as the FI(A).
It was possible in the past for the holder of an FI(A) restricted or not to apply for a CRI(A) without doing any form of test. Reasonable in my opinion as they had already demonstrated to test standard for the issue of in FI(A).
I should imagine that as with any system there are a few CRI(A) kicking around that may be under par and were tested lightly, but then there are a few FI's and TRI that fit that bill as well.
For what it is the CRI is a good rating, it allows the generally experienced to put something into the system.