We need to be realistic with expectation though. Cogger couldn’t keep a starting spot in the very weak and struggling Dogs and Knights teams. He is a downgrade on SOS as the back up halfback.
I feel there's a bit of recency bias at play here.
Before coming to Penrith, O'Sullivan was playing shit football in shit teams too. For example, he couldn't even hold his spot in the wooden spoon bound Broncos in 2020. Before coming to Penrith he had a 38% win record, and had only played 21 games across 4 seasons for 3 different clubs.
I agree that Cogger doesn't have a great win percentage either, but his first 2 seasons he was still eligible for Under 20s and had a serious injury. Then was replaced by the incumbent NSW Halfback in 2018. Later at the Doggies, he was on a hiding to nothing, playing behind a well beaten pack every week.
Cogger will have the same benefits that O'Sullivan had this year: A super dominant forward pack to give him time and space, albeit without a superstar hooker to take the reigns if he's having a quiet one.
I'm confident he'll do the job.