~Snip~
With 3 remaining matches and Arsenal wouldn't be able to win it that possible their 2nd position will shift to Manchester City and Newcastle. This is a pretty embarrassing thing, because Arsenal is always steady play previously, they seem lost control and can not adapt well at the end of season. The opponent already know well how Arteta strategy, and they know very well how to overcome defender, and how to dispel Saka. I don't know what wrong with this, The strategy is look recurrent weakness. This is why arsenal never won a trophy because their strategy can easily be read, and Arteta couldn't improve it on every match.
There are still bigger targets for Arsenal to prioritize than maintaining their position in second place. The defeat to Bournemouth only made the points gap with the team below them closer. Their current position is still safe, they can return to focus on the EPL after playing a life or death game in the second leg of the UCL.
Regardless of what happens on the pitch, I don't see it as a setback for Arsenal performance because 90 minutes against PSG is much more important than taking risks against Bournemouth.