I believe the Europa League is being counted as a major trophy. It's less popular than the Champions League. It offers a small reward. If it had a big prize like the UCL, top clubs would want to play in it.
And even after that, even after they play some games and look like they are doing better, then we will not still know for sure if they are going to win or not. So far they have been terrible, which means that they are going to have even harder time, and that is why I believe that we can't really safely assume how they are going to do.
Just because they changed their coach, and probably got a much better one, doesn't mean that they are good enough to win Europa now. That just means they will be better than how they have been so far, and that may still not be enough. We just have to wait and see, you can bet on them to win if you want, I will not do that before I see how Amorim will do.