Dude, Dortmund could reach the final UCL last season with big efforts. It was not a luck, I hate if someone stated they were only lucky to play in the final. Dortmund reached the final after they won some matches, they didn't jump to the final by winning a single match only. If Dortmund won in a single match, I can agree it is luck. But if they won the matches many times, it is surely not a luck but it is the quality of their game.
I will say this, even though the Dortmund club is rated much lower. But Dortmund is on an upward trend and knows how to focus on its goal this season which is the Champions League, not the Bundesliga. Dortmund must try their best to continue to the finals. But still, Luck accompanied Borussia Dortmund on their journey to the Champions League final.
This still means that the main factor isn't the luck, but efforts and strategy. that's also what we mean to think about Dortmund in the final of UCL.
Sometimes a club has to focus on one thing when they can no longer be as optimal on the other. Like Dortmund, to be honest, if you look at the Bundesliga, it is very unlikely that they can become UCL finalists. However, their efforts and strategy at UCL are very good. It's just that, if you compare it with Real Madrid, it's still not enough.
And this is definitely a very important homework assignment for Dortmund next season, because the Bundesliga is also very competitive now. It's not just about Dortmund and Bayern, but there are also Leverkusen and Stuttgart.
So, whatever it is, Dortmund with its experience of being in the UCL finals yesterday will hopefully improve the club's quality this season.