Just changed my flight to a couple of days later. Same flight, but this time all the odd window seats are taken, except 1L, 9A 9L, 17A.

I assume that 17A is probably the better choice if I don't want to be disturbed by light and noise coming from the galley and/or lavatories?

Although.... the entire center section(D and G seats)) are also basically empty on the seat map. Do they let people just move around and sit anywhere during the flight? (for example, book 9A, sit/eat/work in 9A, but sleep in 11G)