I do agree that Liverpool is far better than the other three, but it feels like it is not such a big deal neither, this is europa and anything could happen, Liverpool could end up losing to Sparta too, I know very unlikely but what I am trying to point out is that they are not really getting anything just because they are a good team, they need to end up playing well enough for all of them.
I think we should consider the situation that may change, Liverpool is the best one but there is no guarantee so anything could happen. I still see Leverkusen as a big title contender as well they are doing so well so far and I think there is a possibility that they may end up with some troubles here and there if they are not really careful.
There is no denying this because even though Leverkusen is currently in a very good condition where Xabi can turn Leverkusen into a club that cannot be underestimated but speaking of quality in terms of players, experience and performance on the field, it is certain that Liverpool is the most favorite club for the Europa League.
As for the issue of guarantees things like this are difficult to predict in the Europa League. We certainly know in the last few seasons after Manchester United, Atletico and Chelsea took turns being champions in the 3 seasons after that there was always a surprise where Villarreal won after winning against Manchester United in the 2020/2021 final or in the previous 2 seasons where there were names Frankfurt and Sevilla which even though if we look at the contestants in the last season there is always Barcelona in it.
Surprises like this can always happen again at this time even though Liverpool cannot be denied they are a strong club but it is not impossible for them to lose and unexpected clubs can get trophies in the Europa League.