What if...
They allow some set of Premier Access passes to be purchased ahead of time, reserving some for 'day of' as well? For those of us who like to plan (and pay) ahead of time, it would be similar to the way FP+ is now. Perhaps some freebies as well for staying on property. It would help those of us who don't like the uncertainty of 'game day' (figuring stuff out on the fly in the park) but also allow those who want to be spontaneous (non-planners) to vie for the the other Premier passes or do the standby options?
If has to be done, do it this way. (is my vote)