You forgot to include Stuttgart in your post of underdogs because they won the DFB-Pokal this season. I really love what plays out this season in English football, Italian football, and German football because the big clubs in those leagues will know that the small clubs are rising to challenge them, and if they fail to perform well, they won't win trophies.
This has always been a thing in the premier league, we always see a tough challenge while watching the teams fight for the premier league trophy. Many of the teams cannot be underrated and at a time, we had the top five teams which they all made big names in the premier league and maintain their performances in that period. Fast forward to today, even the top five teams are trembling on who gets to win the premier league trophy as we don’t get to see all of them lined up on the table to stand a chance for the champions league stage. This competition is only getting tougher for other top European leagues now, and I bet we will get to see a more competitive league competition in the coming seasons from now on from this other leagues too.