You have to imagine that rotated cup teams will become even more prominent now. I still think sacking off the League Cup, as well as the Coupe de la Ligue in France, for at least a few years is the best way to avoid fixture congestion. At the very least, make participation optional.
Totally fine with the Nations League being scrapped as well, if I'm being honest.
Not much point in international friendly tours when you can't have fans in the stadium. They'll pop back up once that can happen, however, as the ticket income will look even more appealing. I suspect that the likes of Man Utd and Barcelona will be (more?) vocal about a European superleague due to their financial issues too.