These changes have been well documented for a while tho.
Not much would change, we're gonna see PSG, Real, Barca, Bayern every season anyway, it's just gonna be less money in football. It's tough for English clubs (for ones that don't spend 300m on fullbacks), others will be there by default anyway, but naive fans will think they've saved something.
American owners weren't any different from others in all of this, they've just built a bad reputation before the announcement. Fans may kick them out of football one day, only to end up with criminals from Russia, Africa, and Qatar.
I think what Perez said about football not being interesting to younger fans is pretty true. But then I also think when I was young I was able to watch the CL because it was easily accessible (and still is here in Ireland) but for kids in the UK you have to have BT to watch it, CL used to be on ITV and it used to capture the imagination of loads of young football fans because it showcased the best of the best on terrestrial TV. Even the FA Cup BBC don't show as many games as the used to. As for the PL it's not accessible at all without the ludicrous Sky subscription. Football was taken from the fans a long time ago and that shouldn't be forgotten at all.