It is no doubt too soon to say anything, but from what I understand MBS is aggressively anti-Shia.  A conflagration triggered by the man may well break out in due course between half of Iraq and Iran on one side and Saudi Arabia, half of Iraq and the GCC on the other.  This is not a good thing at all.

However, as the writer noted, the game of snakes and ladders does include the odd snake, so who knows.  MBS's rise to eminence has left at the very least a large number of bruised egos.  The succession may be contested.