Both can be true, I think. Obviously I don't know about the North Campus AP claim; but I struggle to see how they fit APs and TMs in Epic as it exists alongside single-day guests. I was wondering if Epic would see a pre-HHN season attendance drop a few months back, and it never happened. Epic is as jam-packed as ever with not enough high-capacity attractions to make for a comfy visit.
Unless they limit APs and TM passes to reservation only / after 4PM like has been discussed before, I can only predict that adding those groups would make visiting the park less enjoyable for everyone.