No  We generally only record evidence of title in the United States  No change needs to be made to existing deeds and acres are always the least important information in the description on those deeds in any case often more or less in legalese In fact especially in most of the western United States the normal descriptions in deeds are government sections quarter sections quarterquarter sections and the like and all across the country in towns block and lot description  They arent usually done in metes and bounds Generally there are at least  sections in every survey township which contain more or less than  acres The boundaries wouldnt be redrawn the country wouldnt be resurveyed in onekilometer blocks Parts of the US have already made similar changes from arpents or varas