If F1, the lead is everything. Hard to fault Hamilton for committing to the pas when he sniffed the advantage. Rosberg's reaction was late and had to be aggressive. If anything, more Rosberg's fault than Hamilton's but I think the Stewards got it right.
I honestly dont think NR was late. Here is a screen cap from the video. If you look at NR's line he is clearly closing the door and at this point LH still does not have an overlap. LH was never going to lift, but he should have.