I think that Laulilii will be one of the guys to cement a spot this season and become a regular.
I believe he was our youngest ever debutant after Lawrence and made his debut a week after turning 18. Benji even mentioned he would have debuted him in round 1 last year if it wasn't for the NRL rules.
He will still be 18 for half of this season. He has so much growth in front of him both mentally and physically. Just look at To'o when he was 19-20 years old, physically he wasn't anywhere near what he is now... Reference below (some good highlights of Romey in there also!)