I dont think your position is unreasonable. But what players have shown improvement under Stoops? Most players stayed the same last season, some even regressed. I do think Josh Forrest is the only player I can think about who showed improvement under Stoops. But his tenure is young.
Compare that to Brooks, Woodson looked like he should quit football for a time, then had an incredible JR and SR season. John Connor was a walk on, yes a WALK ON. Zipp Duncan came in as a TE, and ended up an excellent OT. Tamme went from a nobody WR to an NFL caliber TE. Keenan Burton got better every single year.
On Defense, every linebacker that came through showed incredible development over the course of their career. Miller, Williams, Williamson, Trevathan, Woodyard. Winston Guy ended up an NFL player. Trevard Lindley ring a bell? Myron Pryor, Jarmon, and Lumpkin all showed vast improvement.
I love Stoops. And Stoops may change this trend and have players show similar development. But so far, hes way behind in that category.
I'm just pointing out the sample size for Stoops is to small at this point to make the comparison.