He's really not. Although a small(er) sample size, that's Martinez. Shaw has bouts of form where he plays like he's possessed but in general, he's not as dominant/composed as people like to think.
He regularly does lazy push/toe passes on his back foot to his supporting wide player, who's being pressed by the opposition in our own half, where we lose the ball or it's a low probability chance of retention. Also when 'pressed' aka a player simply in his vicinity, he often times takes the easy option of passing it back to the keeper, lofting a dumb ball down the channel, when he has the time to open his body up (for another passing angle etc) or carry it further than 1 yard.
For today's game, I thought he was surprisingly defensively switch on and I don't really have complaints about in possession because it wasn't the type of game to over analyse that.