Just an update. The first route to get the retrofitted aircraft will be TG622/TG623 BKK-KIX v.v. Internal equipment code is 77R. The published equipment code remains 773 so we can't see which flight gets retrofitted aircraft just by looking at the schedule.
The seat in C is arranged 2-3-2 but the seat is the same as in 772ER, which is supposedly better than the previous version in 772.
Two more 772ER will join the fleet by end of October.
ATH will be downgraded from 773 to 772ER.
I'm scheduled on TG 622 this evening to KIX. I hope it is the retrofitted plane as you say.
I'll let you know.