The problem isn't Gana, in a vacuum.
The problem is you absolutely cannot play Doucoure, Onana and Gana together. They are more or less too similar. We need balance in the midfield.
For me, I'd rather give Onana and Gana a go and leave Doucoure out for someone like Garner. Onana has shown he can occasionally make a pass forward - and let Gana do what he does in front of the back 4. Doucs does nothing in attack except for sometimes being in right positions to score goals, but his buildup play is shocking