I reviewed approximately several hundred appraisals after the housing crash - and the great majority of them were inflated by using various tricks - like 98% of them. However, the ones forwarded to me for review likely had already been flagged as problem reports. I can not tell how many total appraisals were inflated vs good reports out there. They forwarded it seems the identified problem child ones
I know there were also good appraisals done, however, the abuse of the mortgage broker select system (which we had warned about ) resulted in too many bad ones
These were all field reviews btw. I am not the only one to have done them, all over the country there were a lot of these reviews performed.
The most interesting form of the review was one lender would send me out on a retrospective appraisal on a property, then they would compare my appraisal to the one they had on file and if there was enough value difference or other issue, then they would forward me the appraisal they had on file for that same property and order a review of it.
With a waiver, there will not be a review because an appraisal was not done. No system of checks and balances on the value imo.