Overall, Arsenal's strength is quite even across all lines, and compared to last season, they've found many options in the front line, especially. Now it's just a matter of mentality and confidence for the Arsenal players to maintain consistent performance and be able to play consistently under pressure. So, if that's successful, I'm quite optimistic about Arsenal this season, because in terms of quality and team strength, Arsenal is quite capable this season.
The strength in the attacking line is indeed slightly better than last season, but considering the result against Liverpool, there may still be many weaknesses that Arteta needs to address, as they struggled to find scoring opportunities. The defeat to Liverpool cannot be a benchmark for overall strength, and that's understandable, as Liverpool themselves also struggled to find scoring opportunities in that match.
Confidence and the ability to play more consistently will be key for Arsenal to remain in the title race. Although Liverpool are much stronger and have a much greater chance this season, I'm sure there are several other teams with the same chance of winning the title this season.