#2 Arsenal's tiredness?
Were the team tired? It's possible since they have played many games lately. Yes, some rotation occurred, but then the Europa League games have had the same players in some capacity. Though Aubameyang, for instance (albeit due to Welbeck's injury), played much of the game vs. Sporting and started vs. Wolves.
The team also has expended a higher work-rate than before, at least compared to the later Wenger period, and a pressing style is more apparent under Emery. So it's natural that more energy is being used and this can take its toll.
If the team were tired, then it's commendable that a draw was attained, and the unbeaten run continues.
The international break may be time to recuperate and regain fitness since the team lack impetus at the moment. Many of the players will be on duty, granted, but even a change in routine/surroundings can reinvigorate.
It may be time also to use more of the youngsters, inclusive of Smith-Rowe, Nketiah, and Maitland-Niles. They've all shown potential in varying degrees of late and could capitalise if older players are worn.