While no bracket will ever be perfect, I'd say this is the most balanced D3 tourney bracket I've seen, and it should produce four very high-caliber teams in the Final Four:
Top left has number 2, 8, 11, 14 and 16 teams in most recent D3 hoops rankings.
Bottom left has 5, 6, 7, 13, 15
Top right has 1, 4, 9, 10
Bottom right has only 3 and 12, so certainly the weakest on paper, but has a lot of teams that may not be highly ranked but who no one would be eager to play (Plattesville, Baldwin-Wallace, New Jersey City, Marietta, Wheaton, Capital).