I'm just glad they finally changed the tray tables... which I'm sure most of us will agree were a pain to open, especially when drinks were present in the tray. I'm going to save my comments on the divider till I experience it myself.
I will say, having flown the "beta" version of the seat on the NEXT A319, I found this seat to be a lot more comfortable than the Delta NEO seat. So I'm really looking forward to this change.