I'm more than confident that a win over Arsenal alone won't get the team back on track, or as many believe - they can fight for any top again. Yes, beating a team like that is a morale booster, but it's not enough and Chelsea still have too much work to do, I think top 5 is even close to happening this season
Arsenal are competitive for EPL title this season, we should expect the very best performance from Gunners because everything will work out smooth for them. Afterall they have one of the best competent coach, Mikel Arteta, he's not relenting as he wants the best result for the team. Chelsea have experienced one of their terrible form last season, but this season is different as there would be high level of football from the blues this season. Mauricio Pochettino ensuring the team bounces back to winning levels because everything going to completely play out fine.
As of now in the big teams, I think only Manchester united are the ones that have fallen apart because of their terrible poor game play and very poor decision making, that includes from the goalkeeper to the strikerd of the team, they are all not getting it right but most especially from the man united back, I mean the errors alone these guys have committed is more than enough to sack the whole back line.