The old format is good and it is been very good way to determine champions even though the draw do favor some teams.
This new format will be good and any team that emerge to be the winner of either the UEFA Champions League, Europa League or conference league would have followed big strategy that will make them to worth the championship. I think squad depth will actually say a lot in the entire process, but luck will still work on some teams and experience will actually tell a lot in the process. The next season’s Champions League and Europa League will be interesting to watch.
In terms of dealing with the new format that will be implemented in the Champions League and Europa League next season, of course all teams will try to keep their key players free from injury and rotate players when it is needed because the new format will make all players get tired faster because of the important games being so close together that they might not get enough rest. And since there is no more group system in the Champions League and Europa League next season, of course it will be very interesting for the spectators but it might not be so interesting for the players who will be draining more of their energy on the pitch.