Onana is still very much in the early stages of development at top level.
It was good to see him be patient, patrolling the lines, guarding the avenues of potential key passes.
The more he concentrates on this the more he's going to learn to see and read the game, and learn to know when to let loose his skills and physical attributes.
Early days though.
Couple of really poor passes.
While he's not fully to blame for the goal you'd think with experience he'd do better and prevent the cut back - he leaves marking the goalscorer to go to the ball carrier, he needs to guard that line, the only way to do that is to ensure the ball carrier goes the endline and set for the block, believe in yourself trust those behind.
Ideally you cut out both options, he offered him both
He doesn't move in quickly enough, not decisive and it's too easy.
Tarks should have given him the call once Tarks passed the goalscorer to cover the endline. Maybe he did.
But Onana is still yhe one that left, to go to, he takes that on with of without the call.
Point of all this rambling, its going to take time.
Maybe Idrissa is better for him in being further up and away from him. His developing vision has less interference from gogo Gana.
If this is what Dyche was thinking then why the he'll did he not play Garner for either Gana or Doucoure?
If he doesn't get this midfield sorted so the team can play to score as well as defend, within reasonable time frame then he's got to go.