Nope. She has her own seat. She's old enough where we don't have the choice. But far from tall enough to kick seats. However with the pitch I have a feeling she'll inevitably stand some there. In Y the seat back annoyance is more for the frequent up and down of the seat tray. But that's not a concern with armrest seat trays.

I'm not so likely to use the lav for noise muffling, but mostly because for most of her fussing a shuffle into the lav will cause more noise than the fussing. But I like the idea of not being on display. I'm guessing delta won't run out of cereal by the time it gets to us. So meal choice won't matter much.

And yes, aisle trips are definitely part of our flight routine. We tend to hang out in the rear galley as long as we can without annoying the flight attendants.