He's brought them through without injuries, which if anything is more difficult.
As for bringing young halves through. Royce had no options in year 1. Leon was crocked and Eastmond was on another planet.
You make your dislike of Brown quite clear, with statements like Brown can finish anywhere as he is pals with Rush.
I on the other hand, have never disliked a Saints coach. Royce is long gone and Brown deserves our support, not snipping from the sidelines about him being best pals and therefore untouchable.