great thoughts. I do like that we are rotating Stewart at catcher, if for no other reason to take some wear off Atwood. It's tough . . . she's got a great arm and can hose runners with it, so she's not a bad defensive catcher at all. She's just not a great blocker IMO. Her bat is something else though - she's a beast.
I did notice that Mitchell's footwork at 1B needs work. I actually like her better at third as well, which is weird because it's a much harder position than 1st. One note on Mitchell and Stewart: they are both surprisingly fast for big hitters. Stewie in particular is a big chick, but she can scoot. What an athlete.
Mia's a tough one. She has the athleticism to play 3B, but she Roger Dorn's too many instead of squaring up and working through the ball. I would also consider some rotation at RF with Maloney (Henry, Mia, Hunter?). Ashton gets on base, which is great for the 9 hole, but her short game/slapping tends to get shut down against good pitching/defenses. Mike has some tough choices to make, but it's great to have so much talent to make the choices tough.