If it breakdown as much as FJ there will lots of folks walking between parks
It's still a cool ideal to connect the parks that way, a nice transition between to two.
No doubt there will be some upset guest who only want to do IOA and all of the Potter so will have to add the US ticket. I am fine with it, but I can imagine the confusion it will cause to walk in day guest. Those who research ahead of time (like most of us) will know going in, but somebody in Orlando for other parks might decide to hop over to IOA for the day without knowing. I am sure Uni will post it 1000 places and still people will not know.
Either way it looks great and we will go after the hype dies down. We hit Potter the first year it was open....never again...it was silly crowded.
Wonder if this forum would have exploded form overload had WDW did something like this