I would LOVE a 90-day resort booking advantage, and 60-day booking for other WDW guests.
Or else, manage blocks of reservations by audience (hotel guests, WDW guests, off-site guests) similar to how they had inventory of park reservations for APs, on-site, and off-site.
To some extent, this is a zero-sum game. Making it easier for Poly guests to get a reservation makes it harder for everybody else. And if it were WDW-wide policy, it would make it harder for us to book reservations at other resorts. (Lookin' at you, Chef Mickey, 1901 Park Fare, and Steakhouse '71). But overall, I think it would be a fair trade.