Cuz-lim seems to be the route!
I (1k) just flew it yesterday and at the luggage drop I was asked if I would like to be placed on the upgrade list. Shortly before boarding we (gf + me) received our new seats upfront.
Quite nice experience to sit in a completely empty C while Y was fully booked.
I think the lady next to our two previous empty Y seats also had a good time

i have a lim-bog flight coming up next week, I hope we’ll get lucky again, since on bog-cuz we sat back in y with a half empty c.