In my opinion, unless you are a local AP holder, you should just continue to plan on making a park reservation. The system is too difficult to understand and the good-to-go dates don't go out far enough for out-of-state AP (Incredipass) holders to plan around them.
Out-of-state Incredipass passholders will need to make reservations on days:
1) that are not marked good to go
2) if you intend on visiting a (non-good-to-go) park before 2pm
3) If you intend on visiting Magic Kingdom on Saturday or Sunday
Simple, right? Well, they just released 6 good-to-go days over the next three weeks (21 days). Good luck planning your vacation around that if you are flying to Florida.
I truly believe the best way to simplify this (for now) is to allow ALL WDW resort guests, access to the parks without reservations. Both daily tickets and APs, staying at a WDW resort hotel should be treated equally in terms of park reservations.