I've totally been in favour of this move, but, I can see where there's a hang up.
He's apparently after 150K/week
http://metro.co.uk/2017/08/15/alex-oxlade-chamberlain-wants-150000-a-week-to-stay-at-arsenal-amid-chelsea-transfer-links-6853944/
I'm not sure how much that affects the dynamics in the team when he would be making more than Willian, Kante, Luiz, etc.
Basically, 3rd, after Hazard, Costa and Courtois
http://metro.co.uk/2017/08/15/alex-oxlade-chamberlain-wants-150000-a-week-to-stay-at-arsenal-amid-chelsea-transfer-links-6853944/