I totally agree with you, there are lots of reasons we can use as a reference to say Barcelona will win by a big score. I am very confident by looking at Barcelona's current ability, and the rest of the opposing teams in this Europa League, Barcelona is the only team that has prestigious achievements compared to other teams.
Yes that's right, Barcelona is a big team that can surprise you at any time, moreover they have great players who are above average level, so it's no trouble for them to win games, but in the world of football unexpected things can happen and Barcelona must not be careless in the condition of a slightly weak opponent, because if they are negligent, then the opponent will take advantage of the condition
In a match any result can happen and I think Eintracht Frankfurt can still hold Barcelona to a draw and it will be decided on penalties, at least I don't underestimate Eintracht Frankfurt. Because after all, the mediocre teams in this tournament sometimes make a surprise by eliminating the favorite team. But indeed, considering the performance of Barcelona which continues to improve then it is certain that Barcelona will win but I am not sure about the big score.
In football we can learn about the statistics of a club, meaning that the odds are very much determined by the team and the players in the club, if the quality of the players has an average ability, it is certain that the club will easily get a win in the match. In the case of matches between big clubs, this is influenced by strategy in determining victory, but if one club does not have the same quality, then it is most likely that the winner is a club that has great quality players, even though we are not trying to underestimate club Eintracht Frankfurt