i see no need for a preassessment on an transisition(upgrade?) to 9k2k. A doc review "maybe" but not an audit. My registrar doesn't offer them unless begged to do so.
The majority is already there, just renumbered. what a waste of money!!! You get CARs issued ,then you fix them...so you get a couple findings......worse case scenario. The new stuff won't constitute a total breakdown of the system, unless you were having problems before. They (registrars) want the system in place..its a new system, so an honest attempt is all they are looking for, after all you need to have room for improvement don't you? An audit by a consultant, maybe, so they can help with anything they find, but not the registrar.
My humble opinion............or .0025 cents worth....LOL