So I flew last night and indeed this flight had the new slim line seats and while the map show a row 13 it does not exist. Row 15 are great seats. Unfortunately, our flight had MX so we went an old version. Row 15 was a std row with no window. But Row 14 was empty and the person next to me took that row and I stayed in 15 with the arm rest up and slept. And given it was night no having a window was not that big of a deal.

Bottom line if Row 13 shows up but there is a gap between 13 and 15 - new layout.