They need a point guard who can handle the ball. Until that happens things won't change.
As it is, Marino, who once was a reasonable outside shot and was reasonably effective from outside, seems to have now decided she wants to dribble even more and repeatedly puts herself in no-win situations inside the key, so they not only don't get her outside shooting, she loses the ball in 'giant land' or throws it away because of the pressure.
Putting all that aside, there is a common factor between the turnovers and the performance inside: passing skills. For mid-court turnovers you can argue the receiver is half the problem, but it's hard to argue that with the centres, who were repeatedly in great position and simply weren't given the ball. And when there was a delivery it was invariably a sloppy, loopy pass that didn't reach the target &/or was deflected or picked off.
A few drills focusing on varying passes [bounce pass, anyone?] and hitting targets through hands/defenders would be a big step in the right direction.
And for what it's worth, I too thought yesterday was the best I've seen from Stewart. Definitely showed more aggression, quickness and awareness, in my opinion.
As for Poppens ... a tour de force!