FWIW - I didn't say 54 pages were necessary. But then I didn't recite all of the stuff you (as representative of those wanting well-developed appraisals in cogent, well-written reports) are entitled to (and appraisers are required to provide) in every GSE related appraisal report. Maybe I need to be retrained, but I seem to be incapable of writing a neighborhood description with any detail (beyond those infamous appraiser descriptors of "average proximity" to "adequate" neighborhood shopping and "average" access to roads, served by "average" utilities" etc. ad nauseum). I certainly have difficulty providing meaningful discussion of neighborhood market conditions that doesn't overflow from the front page of the form. I'll be danged if I'm going to not explain in some detail how the neighborhood one-unit trends were developed if there is insufficient data to indicate those trends on the MC addendum.
Few of my GSE reports rise to that number of pages, but the minimum number seems to be around 30 (with more than 4 comparables required, with the generally required interior photos, the required maps and aerial photos, a copy of my license the generally required USPAP compliance addendum, etc & etc. If appraisers are dumping unnecessary commentary, exhibits, boiler plate and CYA crud, those who are requiring that stuff - and who have belabored appraisers with irrelevant requirements for follow up and additional data and explanation bear a considerable portion of the burden.