The UCL League and Europa League next season will indeed be very interesting, especially with the new format, of course this will be a burden for all teams because the schedule is too busy so that it requires smart coaches to rotate players. With the new format like now, it is the same as torture for players because they have to play in the domestic league, plus the Champions League or Europe with a domestic league model without a group phase, if the coach is not smart in rotating players, then the team players will experience a storm of injuries.
I think all coaches will find a way to create a new strategy in dealing with the new format next season so that their players do not get tired easily and are not easily injured due to the density of matches in a fairly close time. And yes, any coach must be smart enough in managing and rotating each of their players so that the team remains in better condition with mainstay players who do not easily lose their stamina due to this. But I also think that in implementing the new format, of course, it will not be easy for anyone because everyone is still not used to it.
While they will "try" to find a way, I am not sure if all of them will be able to do it or not, it would not be all that simple. We are going to end up with something that will get a bit of time before we could see something changing. All in all, we are going to end up with all of the coaches trying to rest more players, with this many games they will have to push league a bit back, which could be a problem for most of the players.
I mean think about it, europa teams are not really that good at the league most of the time, unless they are like Leverkusen last year, which means that if they also not show that much success at the league so if they also start not caring about the league to rest the players they will lose even more games and rank even worse at standings.
So all of this is a bit of a trouble for most of these teams, they are going to have a lot more trouble and because of that I think most of the teams will decide not to care about this league at all. We are going to end up with something a little worse, it's going to end up with a bit of a problem. I think it's going to be tough, but we could still make that work one way or another if they get a high depth squad.