I'm intimately familiar with the D3 log jam in the two Midwest qualifiers, though I don't know how it shook out with the addition of the seventh one this year.
Ranked teams in each D2 Super Region (per the most recent NWCA Coach's rankings)
SR1 - 15, 16, 17
SR2 - 12, T18
SR3 - 5, 6, 8, 10, T13, 21
SR4 - 4, 7, 20, 22, T24
SR5 - 1, 2, 3, 9, 11, T24
SR6 - T13, T18, 23, T24
SR3 came on big this season when Glenville pulled a lot of transfers, and Simcoe at Grand Valley is building a nice, little program in Western Michigan to add to stalwarts West Liberty, Tiffin, Lake Erie, et al.
SR4 is having a bit of an off year, but the usual suspects of UCO, McKendree, and UIndy are there, along with a resurging CMSU program, run by D2 legend Cody Garcia (with some help behind the scenes from wrestling legend Mike Denney).
SR5 is SR5... that is THE meat grinder of D2 year over year.