LCM is the obvious position to improve. Given how both Zinchenko and Martinelli are shadows following Xhaka's departure, I'm hoping it's a case of them needing someone in between who can facilitate them.
However, there's no arguments from me that they should still hold their own, and be held accountable for their individual performances. Zinchenko takes too many touches and keeps trying to impose himself on the game, without consistently pulling it off. Not to mention his unforced errors. Whilst, Martinelli looks like a bad day Walcott without the off the ball running. Both have been woeful this season.