Koeman said we played well for 25 minutes and then became negative, then after conceding goals decided we should play again and attacked them.
We didn't play well for 25 mins, we hoofed it and luckily, they were dire and didn't control possession and eventually one fell to Rom, who scored as he does.
Then as he said, we became negative and sat back, or we continued to hoof it and they kept the ball better. Our 'much improved defence' allowed 3 goals to be scored. Then, Barkley, Valencia and Lennon came on, we started to play the ball quickly on the ground. The 'on the ground' part shouldn't be underestimated because, it's how we should play. Hoofs up to the front invariably come back at us and as Rom, seems to be exempt from punishment (unlike Ross) for not pressing the ball (running), it's likely to continue.
If, he hasn't got the players that he needs, to play the way he wants to play, then he should accept it and play the way that best suits the players he's got.