I like the plan set forth going into the super-regional. You throw Wallace out there, keeping the ASU hitters off balance with her movement and utilizing her command. You throw Brignac in Game #2 ... because ASU is going to see a somewhat different type of pitcher less than 24 hours later. It is not altogether different than in baseball when you have one type of arm followed by a pitcher with different stuff (whether in the same game or the following game). It is also similar to that of a pitcher getting a batter's eyes trained one way (throwing down and in ... or the rise ball high) and then following with something low, outside, and off the plate. You do not let the opposition's eyes get comfortable with too much of the same type of pitch/pitching. You change it up ... whether it is the location/velocity/spin/break or type of pitcher.
And in an alternative universe where the Cajuns would need a Game #3 ... you come back with Wallace ... and once again, Brignac helps in that she changed the tone/look in the circle in Game #2. The Sun Devil hitters would be less prone to honing in on Wallace's pitches in that follow-on game.
Personally, I think ASU made a mistake in not attempting to see more pitches from Wallace. Too many one pitch and two pitch at-bats. It is difficult to get comfortable as a hitter, especially when you are doing nothing with the few pitches you are seeing.
Brian