He's done quite well so far I feel. When you look at our competitive record so far this season, we have won 4 out of 4 games, we may have only won by small goal margins but I like to think players like Rooney have played an influential role in game management especially when the opposition have had opportunities to go forward and equalise.
I expect he will get better and once the transfer window is closed, we will get a better idea of what role he will play under Koeman.