Your analysis I think is a bit flawed. First, in referencing the 69-70 and 12 year subsequent period we played a max of 26 games a year. Since 2004-05 it's been 32-35 games a year. Naturally we should have more 20+ seasons when we're playing an extra 7 or 8 games a year. Next, our schedule back in the 70's blows away what it is today.
And times have changed with the NCAA and the size of the field. The NCAA tournament expanded its field of teams from 25 to 32 in 1975, to 48 in 1980, to 64 in 1985, and to 68 teams in 2011.
Rather than raw win totals, I'll show win % over the same timeframe. We play more games today, but we win more of the games we do play.
69... 04...
80% 78%
71% 71%
62% 68%
59% 66%
59% 66%
58% 63%
48% 61%
46% 59%
42% 59%
35% 54%
31% 47%
26% 33%
Total Total
51% 60%
The NCAA Tournament field has changed, and that has been GOOD for Ohio, not bad...
We lost to Notre Dame by 30 and lost to Marquette by 24 in 1973 then played them again two years later and lost by 26.
vs.
We lost to Florida by 5, beat Georgetown by 14, lost to Tennessee by 15, beat Michigan by 5, beat South Florida by 6 and lost to North Carolina by 8 in OT.
As far as success over the years Jim Snyder was a long time fixture in Athens and well respected. Later we had Danny Nee who did well in the 80's. These days too many coaches jump at the first bigger $$$$ offer they see. And it often comes back to haunt them (Groce and probably Christian too).
Funny you mention Danny Nee... Didn't he leave Ohio for Nebraska?
Same timeframe
Jim Snyder, Dale Bandy, Danny Nee
Tim O'Shea, John Groce, Jim Christian, Saul Phillips
3 coaches vs 4 coaches. Similar to player loyalty, I would love for our coaches to stick around. I hope Saul Phillips has a career similar to Jim Snyder who coached Ohio for 25 years, but if you give me the choice between Dale Bandy coaching Ohio for 6 years (5 losing seasons) and John Groce or Danny Nee who led Ohio to NCAA Tournament wins but left for bigger jobs, I'll take the NCAA wins.