Looks like someone missed their game at Bournemouth on Saturday...Their depth does suddenly look a lot better. That they had key injuries at a bad time and played well and stayed on top of the league has got to be a big confidence boost. That sort of situation is how they dropped out of the champions league spots last year. This is a much deeper team than that one. Their next 5 league games have a trip to Anfield and then a bunch of bottom half teams. Liverpool is playing better and will be a challenge, but they should be able to rotate in the other games and work around the Europa league matches. Then comes a tough 4 game stretch against City, Chelsea, Newcastle, and Brighton. That is going to be the deciding section of the season. There are also only two games after that, so that's kind of obvious.
Liverpool will also be at the tail end of a tough stretch that features @City, @Chelsea and then vs. Arsenal all within 8 days that should hopefully be of benefit for Arsenal.
More seriously, echoing what MMS said that it was great to have this all locked up by halftime on Sunday due to the ability to bring in subs earlier and save both some legs as well as some wear and tear. Trossard has been such a fabulous addition for this team. It's not just his skill level, but his playing style seems to really work well with Arteta's system. I actually think that Nketiah's injury may have been a blessing in disguise for Arsenal as I have been a bit underwhelmed by Eddie. The number of opportunities he seems to have has been impressive, but seems like his conversion was too low and I had wanted to see Martinelli up top. I really like this look of Martinelli and Trossard switching back and forth between the striker and left wing spots during the run of play. I think that also has been a bit better for Martinelli's legs, as he had been looking a bit sluggish coming out of the World Cup(despite not getting a whole lot of run there).