First off, I am not claiming to know whether Tate has been making good/bad reads on the DE about whether to hand off to the RB or keep it himself on the option read. The point that I'd like to make is that early in the season it did not seem like he was making much of a read at all, but just deferring to the RB most of the time. The first time I noticed him reading the DE and keeping the ball himself was during the last drive at MSU, when he broke off several big runs while the MSU was scrambling after the RBs.
Pat White made a living at WVU from confusing defenses on the Zone Read about whether he or Steve Slaton was going to gash them up. The running game last week at MSU was significantly ineffective for 3 1/2 quarters, and I think that is because they knew that tate wouldn't keep the ball himself and they keyed the RBs. Once he did start making the correct reads, MSU had no answer for him or the offense.
My hope is that RR will address this issue with Tate this week at practice and film, in order to fully utilize the running game, and keep Iowa/future opponents off balance on defense.