I'm not sure what the point you're making here.
My point Arsenal this season is exactly similar to any other Wenger season except his last one. Same football played, same challenging for top 4, same results, same course of the season. They're neither regressing nor progressing under Emery, they're exactly similar.
People kept saying they have progressed because they defeated Spurs 4-2 when Wenger defeated them too last season anyway. They're still the same Arsenal nothing more nothing less. Anyone convinced otherwise had a short memory of where Arsenal was under Wenger.
Can they improve the next season ? Hell sure yes, no one knows the future, but I'm talking about the over drooling here about how Emery changed Arsenal in "half a season" and made them good again, while they're still at the same point as they were under Wenger anyway. It always feels to me the work done by any rival manager gets exaggerated.