I remember when this thread used to be about Ozil
Emery doesn't have a vendetta against him; after Ramsey was injured, Ozil became a starter, playing 77 mins of the EL final and starting against Valencia (2 legs) and Napoli (1 leg), teams who are much tougher than what we usually face in the PL. Ramsey offered more than Ozil last season, it's as simple as that. With Mhikytaryan gone, Ozil might get some game time now.
He just hasn't linked up well with Aubameyang and Lacazette as people had hoped he would; the famous "LMAO" never materialized. This season, he'll have to compete with D Ceballos and Pepe and maybe even Willock, it's TBD at this stage.
But even without Ozil, we aren't struggling to create good chances. We create tons of them, they just end up being missed by our top striker. That's not a problem Ozil can solve.