Thank you both so much for responding. I do want to respond that some of your negatives, fortunately, don't exist and make me feel good about a switch. I work in a technical field and I rarely have to dress up. I wear jeans to work (dressed up from my days off only because they're not yoga pants

). I only have to dress nicely for big meetings and that's not often and is more like "dark pants and a nice sweater" than "suit and heels". Also, I don't have to take a lunch break if I work 6 hours or less. I drive to work and don't pay for parking but the commute is still a factor. I am hoping to go off hours at least in the afternoons.
I agree that it's less visible. Since people at my work seem to work some starting at 6AM and some starting at 9:30AM most meetings are not planned too early or too late.
The less time with my little one is what makes me nervous (for me, more so than for her). I think she'll do well with a more consistant schedule, since she's a naturally scheduled person....my older daughter was much more flexible in that sense. I'm hoping to make up the time with her otherwise and trying to remember how most working Moms don't have the luxury of choosing between 2 part-time schedules at family-friendly workplaces and have to come home at 7PM to put their kids in bed and have all the family time on the weekends. It seems their kids love them just as much as mine love me, so I know it will be okay. Just sometimes change is hard.
I really appreciate the time you both took. I'm going to see if I can try it out for a few weeks, but I have a lot of people to ask before I know if it can happen, so who knows if it will even be a real option!