Liverpool totally destroyed Arsenal in the match. Arsenal played so terrible that they needed a miracle to draw with Liverpool. I really liked especially Jota's performance. He is a too important player for the team and scored 2 goals in this one. I must admit that a 3-0 result was surprising for me. I was seeing Liverpool as the better side and they got a solid win. If they play consistently from now on, they may end the league as the 4th also but it will be quite hard for them.
Arsenal is more focused on the Europa League now.They are trying to win it as this will guarantee them a direct place in the Champions League next year.Of course this is difficult but from the 8 teams remaining Arsenal is one of the strongest team there.
I do not think that Arsenal is focusing on winning the europa league as much as we think, I mean they would prefer to go to europa league or champions league via the premier league if they could, that would mean both more money for them from the league and also guarantee a spot anyway, but they were incredibly horrible this year, like it is honestly horrible, which is why I think it is obvious they are not actually "focusing" on europa league, they just have that alone and nothing else left to fight for anymore, it is not a preference thing but it is a result of being terrible.
In any case they are a good enough team to beat other teams on Europa league, not going to be easy, because there is Ajax which arsenal might win, there is roma which would be same but there is United and I think United is the biggest team in that situation if you ask me.