First thing I would be asking SALT is why she dislikes ABA and praises PECS - PECS is pure ABA!
Then I would ask where her deep prejudice against ABA had come from.
I sympathise, I had the same with my dd when she was small. I had her early years SENCO come around to kickstart PECS (dd1 was verbal, but fairly echolalic. She did have scripted/routine conversations though)
Session went like this:
Dd1 popped into her highchair (so she couldn't escape
), and blueberries were selected as the thing to ask for (dd1 would do anything for blueberries).
SENCO produces snack card (which confusingly had a picture of a biscuit on it!) and explained to dd1 what she had to do. Then put a small pile of blueberries just out of reach.
Dd1: oooh berries, mummy get it ready.
SENCO: I need the card
Dd1: berries. Berries please. Blueberries.
SENCO: card first,mthen berries (aside to me to ask for hand over hand prompting)
Dd1:( bewildered) berries. I see berries. Mummy get it ready (her equivalent of 'please' at the time). Mummy. Mummy get it ready. I like berries. Berries please.
And then she lost the plot, as she had asked and asked for the damn berries, nicely, waited well, could see them, but couldn't have them.
And that was that. I called a halt, as it was just horrible, and dd1 was asking effectively for what she wanted. Sure, she had other vocab issues, but my reasoning was we should work on getting her Using he right words, since she could talk, rather than handing over pictures of biscuits to get blueberries!