Yes, Arsenal still has to maintain the consistency of their game performance. if not City can catch up to what Arsenal now occupy. Moreover, Arsenal still has strong opponents in their last 10 matches.
Even though Arsenal are still leading from points gain, they haven't locked in the Premier League title this season. but seeing Arsenal's performance this season, they should deserve to win the Premier League this season.
Arsenal should put in all there efforts because they are in a dangerous period, any slight missup in Arsenal squad, then Arsenal is already in problem, Arsenal should really put all their efforts in the last matches remaining, they shouldn't underestimate any of those clubs, because a small club can fuck them up, I know Arsenal have really tried this season and they really deserve the Premier League, but they have to continue with the good performance till the end of the season, if they start misbehaving now, then Manchester city might overtake them, and all their efforts is wasted.