There's no point rushing things and over exposing him too early. Many a young promising players careers have been ruined that way.
If he keeps tearing up juniors and does the same in Flegg, I'm sure by this time next year he'll be close to the FG squad.
People also need to remember it's easier for the Roosters to put Sualli in as they're a constant top 4 team that won't rely on him too heavily. We're a bottom 8 team with many holes, so it puts unnecessary pressure on a kid like Alamoti to be the saviour or produce straight away.