Great post
Yes we have a nearly 2 & 4yo atm and it's bit of a circus in J, the boys play and go from mama to tata, sometime's balls or toy cars involved, crayons dropped, ah all fine & fun, crew been fine and yet to get another pax who is upset.
The extra room we find so useful in row 1.
Eco X is really great too.
The lounge gets good use of the ramps especially in MEL. Running up n down.
Do it all again early June, last freebie as young one turns 2yo soon after.
I did read some time ago that a Japanese (I think) airline was going to place a baby or young child marker in the seat map, which thought was a great idea for all pax.