In theory, I agree with most of this. If the other team plays big or crashes offensive glass, playing two bigs could be something you at least spend a few minutes looking at. Depends on matchups as well. With that said, by and large, most teams at the p5 level would victimize a team using two bigs - particularly our bigs. None of Jacobson, Solo or Lard have the lateral ability to stick with athletic 4s or 3s.
As for defense, KenPom has us as the 25th best defense in the country and that significantly outperforms our talent level.
My biggest Prohm complaint is out-of-timeout plays. That's pretty ticky-tack though. I've been happy with the defensive progress.
In the words of Fred Hoiberg, "They have to guard us too." Jacobsen would be fine on the perimeter in the offense but I would prefer a lot of other guys first.