Syd is certainly the more capable overall player and can impact the game in more ways than Molly. She is deserving of her minutes and I assume she will continue to start even if Davis is healthy to play. However, their roles on this particular team -- playing alongside the best player in the country -- are very different. We have to remember that our offense runs through Clark and so the pieces around her on the court must be assembled in such a way that she is set up to succeed. Molly playing PG along Clark is part of that.
If Syd were on a different team / it was a different year, it's probably a different story. But when Molly is on the floor alongside Clark, Clark can move about more freely off the ball. That allows her to get into position for better shots. That's because a defender will always be on the ball -- no one is gonna leave Molly alone if she's bringing the ball down the court, especially since she's a great driver and capable shooter. Syd has proven herself as a capable ball handler (and so has Kate) but they simply haven't played PG for us like Molly (and she has played PG for 5 seasons now so she knows that role inside and out). Neither Kate nor Syd should be expected to all of a sudden become a backup PG in March when they've honed their own roles at the 3/4 and play them very well.
With Molly out, Clark is forced to handle the ball more and basically bring the ball down the court 99% of the time -- which has led to significantly more ball pressure on her. I say that certainly has been a contributing part of all of the frustration she feels being triple-teamed and hacked. Furthermore on a team that lives and dies by the 3, it's just good to have more options in case others are cold. And of course having Molly allows Clark to sit, even if just a few minutes. Playing 36 minutes vs 40 minutes can make a huge difference in a long, tight game, especially when there's a quick turnaround between games.
Even if she's not starting / not 100%, having Molly on the floor to either spell Clark, keep the defense honest on the perimeter, and/or open things up for Clark is a good thing. She also rarely makes mistakes / turns the ball over so she isn't really a net-negative in any glaring way (with the exception of her rebounding, perhaps -- but we have quite a few very good rebounders).
keys to victory other than scoring more points?
last I heard Iowa was a 7.5 pt favorite, which was a bit surprising to me.
ESPN has Iowa as a 6.5 pt favorite with 157.5 pts (82-75 type game?).