Olise's good performances are mouth watering and when he's playing at his best, he would look great in Arteta's system. My concern is that he is very inconsistent and some of that looks like its related to his effort and intensity levels. He definitely has the same type of body language as Ozil where he looks disinterested half the time and it's always tough to tell if that's something to read too much into or not.
If we are looking for a left footer to rotate with Saka, I'm much more interested in Diaby or Raphinha.