Caveat, I am just going on past discussions here and on other forums that I've read, but a particular problem of backseat skiers like myself is extreme crouching to get forward to counteract how much they sit back. So maybe "more open hip" is more accurate or "unlocking your hips". For me, that extreme crouch became ingrained as I skied for so long backseat, and opening up of that hip joint was a key to becoming better able to handle the fore and aft.
"Foot pullback" is a different part of the equation and it is an issue for getting forward properly too. For me and
@KJL we were just sitting on our heels while doing the foot pullback, instead of using the entire foot - which we touch on here. For us, the foot pullback description wasn't enough, which is why I think
@KJL asked about foot position in different parts of the turn.