So, you have 700 homes in a 1 mile radius; so a land area of 3.14 sq miles or 2009.6 acres; averaging 2.87 acres per home. So, yeah, 72 homes on 62 acres does change it every so slightly, but not that much. Your area will now have an average of 2.603 acres per home. Or this community/subdivision will reduce the average by 0.267 acres per home; while bringing in $1.5M in instant revenue to the county, and an additonal $432,000 per year in tax. As an outsider, I know what direction I would vote on the zoning board...
Edit: but back to the main point; if im on the board, and given the facts as you list, and you just stomp you feet and make demands, your another nut, development approved. Done.
However, you come in, again with the facts as you described, and ask for a 30 ft buffer instead of a 20 ft standard buffer, interior to the community bus stop, and a 360 ft right turn lane into the community to prevent vehicle stacking in the PM peak; i likely would demand some or most of those from the developer before approving.