It's kinda hard to correlate it well- choosing a start point, different coaches at UNI... but let's power thru it!
UNI averaged 22 wins per year the 5 years before Fran arrived in 2010 (11.6 conf wins). Same averages if you go with the 7 years before. That's 4 years of BJ and 1 or 3 years of GMac.
Since Fran arrived (13 seasons, not counting this season at all), UNI has averaged 19 wins per year and 10.5 in conference. So worse, but not apocalyptic.
Now, if you compare the last 5-7 years on UNI only -- with the assumption that Fran recruited harder and had leftover players when he started... it gets a bit more pronounced. Then you are at more like 16 wins per year (10 conf wins).
The biggest thing I see is consistency by UNI - ie the lack of it since Fran arrived. They have had a few good years, but seem to bottom out much lower. That certainly could be lack of quality depth due to Fran taking a guy or 3 that would otherwise be at UNI. Or it could be that BJ is not a great coach. Or both, idk.
Since this is the ISR thread, let's blame Fran!
I am sure UNI boards (if they existed) would blame Benny J. This is his 18th year at UNI!