Doba's classes were definitely top heavy.
'03: Byrd, Abdullah, Aaron Johnson, Brink, Ropati, Hill
'04: Harrison, Brackenridge, Jed Collins, Bumpus and...whole lot of nothing.
'05: Gibson, Ahmu, Alfred, Trent, Tardy, and...?
'06: Mattingly, Ivory, uhhhhhhh.
'07: Yeesh
You can't sustain a program with 4-5 contributors per class.
Now, look at Leach's classes...
'13: Mayle, McLennan, Pelleur, Dotson, Sorenson, Pippins, Cracraft, Wicks, O'Connell, Ekuale, Morrow, Madison, Falk, Powell
'14: Luvu, Dillard, Mata'afa
'15: Luani, Martin, Dale, Hillinski, Molton, Williams, Sweet, Tago, Oguayo
'16: Johnson-Mack, Mauigoa, Renard Bell, Patmon, Woods, Strong, Moore, Taylor, McBroom
Heck, even his '12 class that he had to throw together quickly: Vaeao, Barber, Marks, Allison, Lewis, Middleton, Salmonson, Gauta
With the exception of what looks like a hiccup in 2014, every one of those classes had more contributors than any of Doba's. Doba's staff could land some stars (Harrison, Bumpus, Gibson, Brink), but it lacked any kind of depth. So yes, Doba was on par with the 4 stars, but where were the Dotsons, the Sorensons, the Cracrafts, the Luvus, the Moltons.
Doba's classes were also dangerously trending in the wrong direction.