The new format will benefit teams with good squad depth. They will be able to rotate players for each match. This looks good for the big teams. But I think on the other hand this new format will not harm the underdogs because usually the top teams have a tighter schedule than the underdogs. I don't know if my opinion is right or not (cmiiw). This is a new format that was first implemented in European competitions. Honestly, I still miss the old format which I think is very interesting but we can't stay in the past. I hope this new format can make every match interesting to watch.
Looking at the teams who qualified for the Europa this season, interestingly, not many of them have got an awesome or very brilliant depth, but at least they are at almost same ranges with slight differences above each other. The Old format isn't gone long enough to miss already but then we are expectant of a good and smooth working for the new format, as for the underdogs, it's going to be a new way of engagement for them as they aren't engaged this much before now except in their domestic leagues.
For now, I have not been able to say that they have a good squad and are also evenly distributed or not, the article I have not seen what their strengths are like because the season hasn't started and is now only a qualification match. I personally need a longer time to say what differences in strength are like, because I have to base on their appearance first.
I could have seen from the composition of the players they have, but in my experience it is not effective because usually the player can also go up and down in performance and I don't know whether the player is in good or vice versa, so I have to look first at The start of the season, at least 3 or 5 matches. After that I can conclude which teams have a high percentage, yes even though it is also not a guarantee that the team will be able to play well, because sometimes the visit also speaks in football.