First bad season he has had, let's see what he's on next season.
He didn't play no tournament last summer. So fatigue/lack of sharpness he has no excuses tbf.
Martinelli needs Odegaard on his side more than Saka does. Saka does what he does whether its Kalvin Phillips Henderson Ceballos Rice passing him the ball on the RHS. Odegaard doesn't know how to play on the LHS.
Once you accept Odegaard limitations as a player then you'll see why he needs to be upgraded. But like I said before Arsenl have other pressing needs before replacing Odegaard.