I'm on this flight tomorrow. Just noticed I'd been bumped from the just-behind-the-curtain 6A to 7A, so went to MMB to have a look.
Seems the equipment type has changed from a 320 to a '20D', and, curiously, there's no sweet spot behind the curtain anymore, with all rows from row 7 back having 3-3 seating.
Looking at ExpertFlyer, CE is rows 1-6 and 7-27 (27??) is ET. Is this an ex-BMI bird with sardine tin legroom?