Am I reading too much into this? Will Nadal, Federer, and others end up in outer courts when they are not in top 10?
Possibly, and probably. Federer and Nadal will still have their fanbases, but the 'new' top 10 in future will be the ones that people will pay to see and Wimbledon officials will be keen to get them onto the show-courts. Especially the two-week a year Wimbledon fans.
Nadal is the World No.1 & defending champion. He should be no.1 seed. Agassi was actually pretty lucky his last match was against Nadal. Only a match up with Federer, top 4 seed, or a high ranking Brit would have prevented him being put on an outside court.