Sounds like bollocks to me.
If he really had resigned then there would be something about it on this or the middle east forum and there's nothing.He is supposedly on to to good a thing in Doha to leave.
Besides EY is short enough of crew as it is they can't afford to fire as many people as they would have to if he bought in a Qatar esque regime
Plus I have heard nothing and gossip like that spreads like wildfire in Abu Dhabi